Java-b&c practical No. 1 Aim : Write a program to demonstrate command line parameter
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| JAVA-B&C
public class Switch { public static void main(String key[]) { int x=Integer.parseInt(key[0]); switch(x){ case 1: System.out.println(“Monday”); break; case 2: System.out.println(“Tuesday”); break; case 3: System.out.println(“Wednesday”); break; case 4: System.out.println(“Thursday”); break; case 5: System.out.println(“Friday”); break; case 6: System.out.println(“Saturday”); break; case 7: System.out.println(“Sunday”); break; default :System.out.println(“Invalid Number of Day”); } } }
Practical No. 2
Aim: Write a program to implement method overloading.
class Calculation { void sum(int a,int b) { System.out.println(a+b); } void sum(int a,int b,int c) { System.out.println(a+b+c); } } class Overload {
public static void main(String args[]) { Calculation obj=new Calculation(); obj.sum(10,10,10); obj.sum(20,20);
}
Output :
Practical No. 3
Aim : Write a program to use wrapper class.
class WrapperDemo { public static void main (String args[]) { Integer intObj1 = new Integer (25); Integer intObj2 = new Integer (“25″); Integer intObj3= new Integer (35); //compareTo demo System.out.println(“Comparing using compareTo Obj1 and Obj2: ” + intObj1.compareTo(intObj2)); System.out.println(“Comparing using compareTo Obj1 and Obj3: ” + intObj1.compareTo(intObj3)); //Equals demo System.out.println(“Comparing using equals Obj1 and Obj2: ” + intObj1.equals(intObj2)); System.out.println(“Comparing using equals Obj1 and Obj3: ” + intObj1.equals(intObj3)); Float f1 = new Float(“2.25f”); Float f2 = new Float(“20.43f”); Float f3 = new Float(2.25f); System.out.println(“Comparing using compare f1 and f2: ” +Float.compare(f1,f2)); System.out.println(“Comparing using compare f1 and f3: ” +Float.compare(f1,f3)); //Addition of Integer with Float Float f = intObj1.floatValue() + f1; System.out.println(“Addition of intObj1 and f1: “+ intObj1 +”+” +f1+”=” +f ); } }
Output :
Practical No. 4
Aim: Write a program to implement static methods to find the square of number and power function.
class ImpPower { static long Ipower(int num,int pow) { if(pow==0) { return 1; } else if(pow==1) { return num; } else
{ int m=num; for(int i=1;i<=pow;i++) { num=num*m; } return num; } }
class Fourth { public static void main(String args[]) { int m=3,p=4; System.out.println(“3 raise to power 4 is : “+ImpPower.Ipower(m, p)); } }
Practical No. 5
Aim : Write a program to sort an array using bubble sort method.
import java.util.Scanner; class BubbleSort { public static void main(String []args) { int n, c, d, swap; Scanner in = new Scanner(System.in); System.out.println(“Input number of integers to sort”); n = in.nextInt(); int array[] = new int[n]; System.out.println(“Enter ” + n + ” integers”); for (c = 0; c < n; c++) array[c] = in.nextInt();
for (c = 0; c < ( n – 1 ); c++) { for (d = 0; d < n – c – 1; d++) { if (array[d] > array[d+1]) /* For descending order use < */ { swap = array[d]; array[d] = array[d+1]; array[d+1] = swap; } }
System.out.println(“Sorted list of numbers”);
for (c = 0; c < n; c++) System.out.println(array[c]); } } Output :
class BillingAddress { private String firstName; private String lastName; public BillingAddress(String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } public boolean equals(Object obj) { boolean isEqual = false; if (this.getClass() == obj.getClass()) { BillingAddress billingAddress = (BillingAddress) obj; if ((billingAddress.firstName).equals(this.firstName) && (billingAddress.lastName).equals(this.lastName)) { isEqual = true; } } return isEqual; } } class Sixth { public static void main(String[] arg) { BillingAddress obj1 = new BillingAddress(“john”, “bates”); BillingAddress obj2 = new BillingAddress(“Abc”, “Kumar”); if (obj1.equals(obj2)) { System.out.println(“Both the objects are equal”); } else
{ System.out.println(“Both the objects are not equal”); } } }
import java.util.Scanner; abstract class A { abstract void area(); } class Rectangle extends A { void area() { Scanner scan= new Scanner(System.in); System.out.println(“Enter the lenght : “); int Len=scan.nextInt(); System.out.println(“Enter the Breadth : “); int bre=scan.nextInt(); System.out.println(“Enter the Height : “); int high=scan.nextInt(); int a=Len*bre*high; System.out.println(“Area of Rectangle : “+a); } }
class Triangle extends A { void area() { Scanner scan= new Scanner(System.in); System.out.println(“Enter the Base : “); int Base=scan.nextInt(); System.out.println(“Enter the Height : “); int height=scan.nextInt(); double a=0.5*Base*height; System.out.println(“Area of Triangle : “+a); } }
class Circle extends A { void area() { Scanner scan= new Scanner(System.in); System.out.println(“Enter the Radius : “); int rad=scan.nextInt(); double a=3.14*rad*rad; System.out.println(“Area of Circle : “+a); } }
public class Dispatch { public static void main(String args[]) { Rectangle b = new Rectangle(); Triangle c = new Triangle(); Circle d= new Circle(); A r;
r.area();
r = c; r.area();
r = d; r.area(); } } Output :
Practical No. 8
Aim: Write a program to demonstrate single inheritance.
class Box { int width; int height; int depth; Box(int w, int h,int d) { width=w; height=h; depth=d;
} int volume() { return width*height*depth; } } class boxweight extends Box { int weight; boxweight(int w,int h,int d,int weigh) { super(w,h,d); weight=weigh; } void display() { System.out.println(“Width : “+width); System.out.println(“Height : “+height); System.out.println(“Depth : “+depth); System.out.println(“Weight : “+weight); System.out.println(“Volume : “+volume()); } }
{ public static void main(String args[]) { boxweight b= new boxweight(4,5,6,7); b.display(); } }
class Student { int rollNumber; float marks1,marks2,marks3; void getdata(int r,float m1,float m2,float m3) { rollNumber=r; marks1=m1; marks2=m2; marks3=m3; } void putdata() { System.out.println(“Roll NUmber : “+rollNumber); System.out.println(“Marks1 : “+marks1); System.out.println(“Marks2 : “+marks2); System.out.println(“Marks3 : “+marks3); } } interface Sports { float wt=6.0F; void putwt(); } class Results extends Student implements Sports { float total; public void putwt() { System.out.println(“Sports wt : “+wt); } void display() { total= marks1+marks2+marks3+wt; putdata(); putwt();
System.out.println(“Total score : “+ total); } } class ninth { public static void main(String args[]) { Results student1= new Results(); student1.getdata(4,50,60,70); student1.display(); } }
Output :
SamplePackage:- package packdemo;
public class samepackage { public void show1() { protection p=new protection(3,8,9); System.out.println(“m= “+p.m); //System.out.println(“n= “+p.n); System.out.println(“o= “+p.o); } } Derived Package:-
package packdemo; public class derived extends protection { public derived(int m1,int n1,int o1) { super(m1,n1,o1); } public void show() { System.out.println(“m= “+m); //System.out.println(“n= “+n); System.out.println(“o= “+o); } }
Protection package:-
Packdemo:-
import packdemo.protection; import packdemo.derived; import packdemo.samepackage;
class packdemomain { public static void main(String[] args) { derived d=new derived(2,4,6); d.show(); samepackage s=new samepackage(); s.show1(); } }
Practical No. 11
import java.util.*; class TextSearch { public static void main(String as[]) throws Exception { Scanner scan=new Scanner(System.in); int i=0,count=0; String text=””,s=””; System.out.println(“Enter Text:(press ENTER to stop)\n”); s=scan.nextLine(); while(s.length()!=0) { text+=s; s=scan.nextLine(); } System.out.println(“Enter search word:”); s=scan.nextLine(); while(true) { i=text.indexOf(s,i); if(i==-1) break;
System.out.println(“Word found at position:”+(i+1)); count++;
i+=s.length(); } System.out.println(“Number of occurrences of given word:”+count); } }
Output :
Practical No. 12
Aim : Write a program that will read a string and rewrite it in alphabetical order (STRING AS GINRST).
import java.util.*; class twelve { public static void main(String args[])throws Exception { Scanner scan = new Scanner(System.in); System.out.println(“Enter a string:”); String s = scan.nextLine(); char input[] = s.toCharArray(); for(int i = input.length-2; i>=0; i–) { for(int j=0; j<=i; j++) { if(input[j] > input[j+1]) { char temp = input[j]; input[j] = input[j+1]; input[j+1] = temp; } }
System.out.println(“In sorted Order: ” + new String(input));}}
Output :
import java.io.Console;
public class Vowels { public static final char[] CONSONANTS = { ‘b’, ‘c’, ‘d’, ‘f’, ‘g’, ‘h’, ‘j’, ‘k’, ‘l’, ‘m’, ‘n’, ‘p’, ‘q’, ‘r’, ‘s’, ‘t’, ‘v’, ‘w’, ‘x’, ‘y’, ‘z’};
public static final char SPACE = ‘ ‘; static char[] getConsonants() { return CONSONANTS; } static boolean isConsonant(char c) { boolean isConsonant = false; for (int i = 0; i < getConsonants().length; i++) { if (getConsonants()[i] == c) { isConsonant = true; break; }
return isConsonant; } static boolean isSpace(char c) { return SPACE == c; } public static void main(String[] args) { int spaces = 0; int consonants = 0; int vowelcount = 0;
Console console = System.console(); console.format(“Enter a String:”);
String text = console.readLine();; for (int index = 0; index < text.length(); index++) { char letter = text.charAt(index); if (!isSpace(letter)) { if (isConsonant(letter)) { consonants++; } else { vowelcount++; }
spaces++; } } System.out.println (“Vowels:” + vowelcount + “\nConsonants :” + consonants + “\nSpaces : ” + spaces); } }
Output :
import java.util.*; class Palindrome { public static void main(String args[]) { String original, reverse=””; Scanner in = new Scanner(System.in); System.out.println(“Enter a string to check if it is a palindrome”); original = in.nextLine(); int length = original.length(); for ( int i = length – 1 ; i >= 0 ; i– ) reverse = reverse + original.charAt(i); if (original.equals(reverse)) System.out.println(“Entered string is a palindrome.”); else System.out.println(“Entered string is not a palindrome.”); } }
Output :
class Error4 { public static void main(String args[]) { int a[]={5,10}; int b=5; try
{ int x=a[2]/b-a[1]; } catch(ArithmeticException e) { System.out.println(“Division by zero”); } catch(ArrayIndexOutOfBoundsException e) { System.out.println(“Array index error”); } catch(ArrayStoreException e) { System.out.println(“Wrong data type”); } int y=a[1]/a[0]; System.out.println(“y = “+y); } } Output :
Practical No. 16
Aim: Write a program to create own exception and Create a student class if marks is greater than 100 to use this exception.
import java.lang.Exception; import java.util.*; class MyException extends Exception { MyException(String message) { super(message); } }
{ public static void main(String args[]) { Scanner scan= new Scanner(System.in); System.out.println(“Enter the marks : “); int mrks1=scan.nextInt(); try { if(mrks1>100) { throw new MyException(“Marks are out of Bound”); } } catch(MyException e) { System.out.println(“Caught my exception : “); System.out.println(e.getMessage()); } finally
{ System.out.println(“I am always here”); } }
Output :
class tm extends Thread { public void run() { System.out.println(“This is a multiplication table.”); } }
{ public void run() { int count=0; System.out.println(“Prime Numbers : “); for(int i=2;i<30;i++) { count=0;
for(int j=2;j { if(i%j==0) { count++;
} } if(count==0) { System.out.print(i+”\t”); } }
} } class tf extends Thread { public void run() { int a=-1,b=1,c=0; System.out.println(“Fibonacci Series.”); for( c=0;c<=21;c++) { c=a+b;
System.out.print(c+”\t”); a=b;
b=c; } System.out.println(); } } class Threading { public static void main(String args[]) { tf tf1=new tf(); tp tp1=new tp(); tm tm1= new tm(); //tf1.setPriority(Thread.MAX_PRIORITY); tf1.start(); tp1.start(); tm1.start(); } }
Output :
class thrun implements Runnable { Thread t; boolean runn = true;
thrun(String st,int p) { t = new Thread(this,st); t.setPriority(p); t.start(); } publicvoid run() { System.out.println(“Thread name : ” + t.getName()); System.out.println(“Thread Priority : ” + t.getPriority()); } } class priority { publicstaticvoid main(String args[]) { Thread.currentThread().setPriority(Thread.MAX_PRIORITY); thrun t1 = new thrun(“Thread1″,Thread.NORM_PRIORITY + 2); thrun t2 = new thrun(“Thread2″,Thread.NORM_PRIORITY – 2); System.out.println(“Main Thread : ” + Thread.currentThread()); System.out.println(“Main Thread Priority : ” + Thread.currentThread().getPriority()); } }
Output :
Main Thread : Thread[main,10,main] Main Thread Priority : 10 Thread name : Thread2 Thread name : Thread1 Thread Priority : 7 Thread Priority : 3
import java.awt.*; import java.applet.*; import javax.swing.*; /**/ public class lifecycleApplet extends JApplet { public void init() { System.out.println(“This is init”); } public void start() { System.out.println(“Applet started”); } public void paint(Graphics g) { g.drawString(“Vande Mathram”,20,30); g.drawRect(166,49,336,79); g.setColor(Color.orange); for(int i=0;i<20;i++) { g.drawLine(166,48+i,500,48+i); } g.setColor(Color.blue); g.drawOval(310,70,30,30); g.fillOval(310,70,30,30); g.setColor(Color.black); g.drawLine(166,68,500,68); g.drawLine(166,100,500,100); g.setColor(Color.green); for(int i=0;i<20;i++) { g.drawLine(166,105+i,500,105+i); } g.setColor(Color.black); g.drawLine(166,49,166,549); g.drawRect(136,549,166,589); //System.out.println(“Applet just painted”); } public void stop() { System.out.println(“Applet stoped”); } public void destroy() { System.out.println(“Applet destroyed”); } }
Practical No. 20
Aim: Write an applet program to perform addition, subtraction, multiplication and division of two numbers.
import javax.swing.*; import java.awt.*; import java.awt.event.*;
/**/ public class calculator extends JApplet implements ActionListener { private JLabel l1,l2,l3; private JTextField t1,t2,t3; private JButton b1,b2,b3,b4; public void init() { Container c=getContentPane(); c.setLayout(new GridLayout(5,2)); l1=new JLabel(“First No. :”); l2=new JLabel(“Second No. :”); l3=new JLabel(“Result :”); t1=new JTextField(10); t2=new JTextField(10); t3=new JTextField(10); b1=new JButton(“Add”); b2=new JButton(“Sub”); b3=new JButton(“Mul”); b4=new JButton(“Div”); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); c.add(l1); c.add(t1); c.add(l2); c.add(t2); c.add(l3); c.add(t3); c.add(b1); c.add(b2); c.add(b3); c.add(b4); } public void actionPerformed(ActionEvent ae) { int a,b,c; a=Integer.parseInt(t1.getText()); b=Integer.parseInt(t2.getText()); if(ae.getSource()==b1) { c=a+b; t3.setText(“”+c); } if(ae.getSource()==b2) { c=a-b;
t3.setText(“”+c); } if(ae.getSource()==b3) { c=a*b;
t3.setText(“”+c); } if(ae.getSource()==b4) { c=a/b;
t3.setText(“”+c); } } }
Practical No. 21
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*;
class Calculator extends JFrame { private final Font BIGGER_FONT = new Font(“monspaced”,Font.PLAIN, 20); private JTextField textfield; private boolean number = true; private String equalOp = “=”; private CalculatorOp op = new CalculatorOp(); public Calculator() { textfield = new JTextField(“”, 12); textfield.setHorizontalAlignment(JTextField.RIGHT); textfield.setFont(BIGGER_FONT); ActionListener numberListener = new NumberListener(); String buttonOrder = “1234567890 “; JPanel buttonPanel = new JPanel(); buttonPanel.setLayout(new GridLayout(4, 4, 4, 4)); for (int i = 0; i < buttonOrder.length(); i++) { String key = buttonOrder.substring(i, i+1); if (key.equals(” “)) { buttonPanel.add(new JLabel(“”)); } else {
JButton button = new JButton(key); button.addActionListener(numberListener); button.setFont(BIGGER_FONT); buttonPanel.add(button); } }
JPanel panel = new JPanel(); panel.setLayout(new GridLayout(4, 4, 4, 4)); String[] opOrder = {“+”, “-”, “*”, “/”,”=”,”C”,”sin”,”cos”,”log”}; for (int i = 0; i < opOrder.length; i++) { JButton button = new JButton(opOrder[i]); button.addActionListener(operatorListener); button.setFont(BIGGER_FONT); panel.add(button); } JPanel pan = new JPanel(); pan.setLayout(new BorderLayout(4, 4)); pan.add(textfield, BorderLayout.NORTH ); pan.add(buttonPanel , BorderLayout.CENTER); pan.add(panel , BorderLayout.EAST); this.setContentPane(pan); this.pack(); this.setTitle(“Calculator”); this.setResizable(false); } private void action() { number = true; textfield.setText(“”); equalOp = “=”; op.setTotal(“”); } class OperatorListener implements ActionListener { public void actionPerformed(ActionEvent e) { String displayText = textfield.getText(); if (e.getActionCommand().equals(“sin”)) { textfield.setText(“” + Math.sin(Double.valueOf(displayText).doubleValue())); }else if (e.getActionCommand().equals(“cos”)) { textfield.setText(“” + Math.cos(Double.valueOf(displayText).doubleValue())); } else
if (e.getActionCommand().equals(“log”)) { textfield.setText(“” + Math.log(Double.valueOf(displayText).doubleValue())); } else if (e.getActionCommand().equals(“C”)) { textfield.setText(“”); }
else { if (number) { action(); textfield.setText(“”); } else { number = true; if (equalOp.equals(“=”)) { op.setTotal(displayText); }else if (equalOp.equals(“+”)) { op.add(displayText); } else if (equalOp.equals(“-”)) { op.subtract(displayText); } else if (equalOp.equals(“*”)) { op.multiply(displayText); } else if (equalOp.equals(“/”)) { op.divide(displayText); } textfield.setText(“” + op.getTotalString()); equalOp = e.getActionCommand(); } } } } class NumberListener implements ActionListener { public void actionPerformed(ActionEvent event) { String digit = event.getActionCommand(); if (number) { textfield.setText(digit); number = false; } else {
textfield.setText(textfield.getText() + digit); } } } public class CalculatorOp { private int total; public CalculatorOp() { total = 0; } public String getTotalString() { return “”+total; } public void setTotal(String n) { total = convertToNumber(n); } public void add(String n) { total += convertToNumber(n); } public void subtract(String n) { total -= convertToNumber(n); } public void multiply(String n) { total *= convertToNumber(n); } public void divide(String n) { total /= convertToNumber(n); } private int convertToNumber(String n) { return Integer.parseInt(n); } } } class SwingCalculator { public static void main(String[] args) { JFrame frame = new Calculator(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }
Practical No. 22
be passed as parameter. This applet creates a thread that scrolls the message contained in message right to left across the applet’s window & also uses status.
import java.awt.*; import javax.swing.*; import java.util.*;
/*
*/ public class Bannerdemo extends JApplet implements Runnable { Thread t; String s,tmp,rno; int i;
public Bannerdemo() { tmp=” “; i=0; s=” “;
//rno=getParameter(“rno”); } public void init() { tmp=” “;
i=0; s=” “;
rno=getParameter(“rno”); //rno=new String(“MCA17″); } public void run() {
for(;;) { try{
if(i==100) i=0;
repaint(); Thread.sleep(250); tmp=tmp+” “; s=tmp;
i=i+2; rno=rno.substring(1,rno.length()).concat(rno.substring(0,1)); }catch(Exception e) {} } } public void start() { t=new Thread(this); t.start(); } public void paint(Graphics g) { setBackground(new Color(255,255,255-(i+i))); g.clearRect(0,0,1000,1000); g.drawString(“MCA17″+s,300-i,10); g.drawString(rno,300-i,50); } }
import java.awt.*; import javax.swing.*; import java.awt.event.*; public class biodata extends JFrame implements ActionListener { JLabel l1,l2,l3,l4,l5,l6,l7; JTextField t1,t2; JTextArea ta1; JCheckBox c1,c2,c3; JTable tb1; JButton b1,b2; JRadioButton r1,r2; JScrollPane sp1,sp2; JComboBox cb1,cb2,cb3; int i; GridBagLayout gbl=new GridBagLayout(); GridBagConstraints gbc=new GridBagConstraints(); Container con; public biodata(){ l1=new JLabel(“Name :-”); l2=new JLabel(“Address :-”); l3=new JLabel(“Telephone No. :-”); l4=new JLabel(“Gender :-”); l5=new JLabel(“Date Of Birth :-”); l6=new JLabel(“Language known :-”); l7=new JLabel(“Education Qualification :-”); t1=new JTextField(20); t2=new JTextField(20); ta1=new JTextArea(30,20); //JRadioButton r1=new JRadioButton(“Male”); r2=new JRadioButton(“Female”); //JCheckBox c1=new JCheckBox(“English”); c2=new JCheckBox(“Marathi”); c3=new JCheckBox(“Hindi”); //JComboBox cb1=new JComboBox(); for(int i=1;i<=31;i++){ cb1.addItem(“”+i);} cb2=new JComboBox(); for(int i=1;i<=12;i++){ cb2.addItem(“”+i);} cb3=new JComboBox(); for(int i=1990;i<=2020;i++){ cb3.addItem(“”+i);} b1=new JButton(“ok”); b1.addActionListener(this); b2=new JButton(“Cancel”); b2.addActionListener(this); sp1=new JScrollPane(ta1,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); tb1=new JTable(); Object rowdata[][]={{“S.S.C.”,”2008″,”70%”,”I”},{“H.S.C”,”2010″,”64%”,”I”},{“B.S.C(cs)”,”2013″,”80%”,”I”}}; Object Coldata[]={“Board”,”Year of Passing”,”Percentage”,”Class”}; tb1=new JTable(rowdata,Coldata); sp2=new JScrollPane(tb1,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); ButtonGroup gp=new ButtonGroup(); gp.add(r1);gp.add(r2); con=getContentPane(); con.setLayout(gbl); gbc.fill=GridBagConstraints.HORIZONTAL; gbc.weightx=1.0;gbc.weighty=1.0; //name gbc.gridx=0;gbc.gridy=0; con.add(l1,gbc); gbc.gridx=1;gbc.gridy=0; con.add(t1,gbc); //ADDRESS gbc.gridx=0;gbc.gridy=1; con.add(l2,gbc); gbc.gridx=1;gbc.gridy=1; gbc.fill=GridBagConstraints.RELATIVE; gbc.fill=GridBagConstraints.BOTH; con.add(sp1,gbc); //Telephone gbc.gridx=0;gbc.gridy=2; con.add(l3,gbc); gbc.gridx=1;gbc.gridy=2; gbc.fill=GridBagConstraints.HORIZONTAL; con.add(t2,gbc); //Date Of Birth gbc.gridx=0;gbc.gridy=3; con.add(l5,gbc); gbc.gridx=1;gbc.gridy=3; con.add(cb1,gbc); gbc.gridx=2;gbc.gridy=3; con.add(cb2,gbc); gbc.gridx=3;gbc.gridy=3; con.add(cb3,gbc); //Gender
gbc.gridx=0; gbc.gridy=4; con.add(l4,gbc); gbc.gridx=1;gbc.gridy=4; con.add(r1,gbc); gbc.gridx=2;gbc.gridy=4; con.add(r2,gbc); //Languages Known gbc.gridx=0;gbc.gridy=5; con.add(l6,gbc); gbc.gridx=1;gbc.gridy=5; con.add(c1,gbc); gbc.gridx=2;gbc.gridy=5; con.add(c2,gbc); gbc.gridx=3;gbc.gridy=5; con.add(c3,gbc); //Education Qualification gbc.gridx=0;gbc.gridy=6; con.add(l7,gbc); gbc.gridx=1;gbc.gridy=6; gbc.gridwidth=2;gbc.gridheight=2; gbc.fill=GridBagConstraints.BOTH; con.add(sp2,gbc); gbc.fill=GridBagConstraints.RELATIVE; // CMD Buttons gbc.gridx=1; gbc.gridy=7; con.add(b1,gbc); gbc.gridx=2;gbc.gridy=7; con.add(b2,gbc); setSize(500,700); show();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);} public void actionPerformed(ActionEvent ae){ String a,b,c; a=t1.getText(); b=t2.getText(); c=ta1.getText(); if (ae.getSource()==b1){ if(a.equals(“”)||b.equals(“”)||c.equals(“”)){ JOptionPane.showMessageDialog(this,”Please enter the All the TextBox !!”);} else
if((r1.isSelected()==false)&&(r2.isSelected()==false)){ JOptionPane.showMessageDialog(this,”Please Select the Gender !!”); } else if((c1.isSelected()==false)&&(c2.isSelected()==false)&&(c3.isSelected()==false)){ JOptionPane.showMessageDialog(this,”Please Select the Language Known !!”);} elseif(ae.getSource()==b1){ JOptionPane.showMessageDialog(this,”BIODATA UPDATED !!”);} } if (ae.getSource()==b2){ System.exit(0);} } public static void main(String []args){ new biodata(); }}
import java.awt.*; import javax.swing.*; import java.sql.*; import java.awt.event.*; import java.util.Vector;
public class friend extends JFrame implements ActionListener{ JLabel lname,lDOB,lAddress,lPhno; JTextField txtname,txtdob,txtadd,txtphno; JButton btnadd,btnshow; Connection dbcon; Statement st; String str=””; ResultSet rs;
public friend(){ Container con=getContentPane(); con.setLayout(null); con.setBackground(Color.GREEN);
lname=new JLabel(“Friend_Name :-”); lname.setFont(new Font(“Georgia”,Font.PLAIN,12)); lname.setBounds(20,40,100,25); add(lname);
lDOB=new JLabel(“DOB :-”); lDOB.setFont(new Font(“Georgia”,Font.PLAIN,12)); lDOB.setBounds(20,80,100,25); add(lDOB);
lAddress=new JLabel(“Address :-”); lAddress.setFont(new Font(“Georgia”,Font.PLAIN,12)); lAddress.setBounds(20,120,100,25); add(lAddress);
lPhno=new JLabel(“Phno :-”); lPhno.setFont(new Font(“Georgia”,Font.PLAIN,12)); lPhno.setBounds(20,160,100,25); add(lPhno);
txtname=new JTextField(20); txtname.setBounds(150,40,200,25); add(txtname);
txtdob=new JTextField(20); txtdob.setBounds(150,80,200,25); add(txtdob);
txtadd=new JTextField(20); txtadd.setBounds(150,120,200,25); add(txtadd);
txtphno=new JTextField(20); txtphno.setBounds(150,160,200,25); add(txtphno);
btnadd=new JButton(“SAVE”); btnadd.addActionListener(this); btnadd.setBounds(150,200,80,30); add(btnadd); btnshow=new JButton(“SHOW”); btnshow.addActionListener(this); btnshow.setBounds(250,200,80,30); add(btnshow);
setVisible(true); setSize(500,500); }
public void actionPerformed(ActionEvent ae){ if(ae.getSource()==btnadd){ String a=txtname.getText(); String b=txtdob.getText(); String c=txtadd.getText(); String d=txtphno.getText(); try{ //JOptionPane.showMessageDialog(this, “Record Saved”); Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”); dbcon=DriverManager.getConnection(“jdbc:odbc:Friend”); st=dbcon.createStatement(); JOptionPane.showMessageDialog(this, “Record Saved”); String sql=”insert into Dosti1(Name,Dob,Address,Phno)values(‘”+a+”‘,’”+b+”‘,’”+c+”‘,’”+d+”‘)”; st.executeQuery(sql); JOptionPane.showMessageDialog(this, “Record Saved”);
}catch(Exception ex){} } if(ae.getSource()==btnshow){ Show as=new Show(); } } public static void main(String []args){ new friend(); }
String mysql; JTable jt1; JScrollPane jsp; int v,h;
Statement st; ResultSet rs; Connection dbcon;
JFrame JFParentFrame; public Show(){
Container con=getContentPane(); con.setLayout(new FlowLayout());
try { Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”); dbcon=DriverManager.getConnection(“jdbc:odbc:Friend”); st =dbcon.createStatement(); mysql=”select * from Dosti1″; rs=st.executeQuery(mysql); Vector ch=new Vector(); ch.add(“Name”); ch.add(“Dob”); ch.add(“Address”); ch.add(“Phno”);
Vector data =new Vector(); while(rs.next()) { Vector row=new Vector(); row.addElement(rs.getString(“Name”)); row.addElement(rs.getString(“Dob”)); row.addElement(rs.getString(“Address”)); row.addElement(rs.getString(“Phno”));
data.addElement(row); } jt1=new JTable(data,ch); } catch(Exception e){System.out.println(e); } v=ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS; h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
jsp=new JScrollPane(jt1,v,h); con.add(jsp); setSize(500,500); setResizable(false); show(); } }
}
Practical No. 25
import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import javax.swing.*; import java.awt.event.*; import java.awt.*;
public class ResultSetDemo extends JFrame implements ActionListener,ItemListener { JButton btnShow; JLabel lbl,lblQ,lblR,lblT; JTextField tx1; JComboBox product; Connection conn,conn1; Statement st,st1; String pr; int r=0; public static void main(String[] args) { ResultSetDemo r=new ResultSetDemo(); }
ResultSetDemo() { Container c=getContentPane(); c.setLayout(new FlowLayout()); setVisible(true); setSize(200,200);
btnShow = new JButton(“Add”); lbl = new JLabel(“Rate : “); lblQ = new JLabel(“Quantity”); lblR = new JLabel(); lblT = new JLabel(); product=new JComboBox(); tx1=new JTextField(20); //tx2=new JTextField(20);
c.add(product); c.add(lblQ); c.add(tx1); c.add(lbl); c.add(lblR); c.add(btnShow); c.add(lblT);
btnShow.addActionListener(this); product.addItemListener(this); try
{ Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”); conn = DriverManager.getConnection(“jdbc:odbc:Phone”); st = conn.createStatement(); ResultSet rs = st.executeQuery(“select * from Cust”); String msg=””; ResultSet rs1 = st.executeQuery(“select * from Products”); String item; while(rs1.next()) { item=rs1.getString(“NameP”); product.addItem(item); } lbl.setText(msg); rs.close(); st.close(); conn.close(); } catch (Exception e) { }
} public void itemStateChanged(ItemEvent e) { pr=product.getSelectedItem().toString(); String q=”select rate from Products where NameP = ‘”+pr+”‘”; try
{ conn1 = DriverManager.getConnection(“jdbc:odbc:Phone”); st1 = conn.createStatement(); ResultSet rs2 = st1.executeQuery(q); rs2.next(); r=rs2.getInt(“rate”); } catch (Exception e11) { } lblR.setText(” “+r); } public void actionPerformed(ActionEvent ae) { int total=0; int q=Integer.parseInt(tx1.getText()); total=r*q; lblT.setText(” “+total); } }
class Employee implements java.io.Serializable { public String name; public String address; public transient int SSN; public int number;
public void mailCheck() { System.out.println(“Mailing a check to ” + name + ” ” + address); } }
//SerializeDemo.java import java.io.*; class SerializeDemo { public static void main(String[] args) { Employee e = new Employee(); e.name = “Santosh Goilkar”; e.address = “Chembur”; e.SSN = 10; e.number = 1010; try {
ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(e); out.close(); fileOut.close(); System.out.println(“serealized”); } catch (IOException i) { i.printStackTrace();} } }
// DeserializeDemo.java import java.io.*; class DeserializeDemo { public static void main(String[] args) { Employee e = null; try {
ObjectInputStream in = new ObjectInputStream(fileIn); e = (Employee) in.readObject(); in.close(); fileIn.close(); } catch (IOException i) { i.printStackTrace(); return;
} catch (ClassNotFoundException c) { System.out.println(“Employee class not found”); c.printStackTrace(); return;
} System.out.println(“Name: ” + e.name); System.out.println(“Address: ” + e.address); System.out.println(“SSN: ” + e.SSN); System.out.println(“Number: ” + e.number); } } /* Output:
H:\sem 4\Java\done>javac Employee.java H:\sem 4\Java\done>javac SerializeDemo.java H:\sem 4\Java\done>java SerializeDemo serealized H:\sem 4\Java\done>javac DeserializeDemo.java H:\sem 4\Java\done>java DeserializeDemo Name: Santosh Goilkar Address: Chembur SSN: 10 Number: 1010 */
Practical No. 27
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