Untitled

LAB 1B: Program to catch Negative Array Size Exception. This exception is caused when the array size is initialized to negative values.

public class Pgm1b 
{
	public static void main(String[] args) 
	{
		try
		{
			int[] array = new int[-2];
		}
		catch(NegativeArraySizeException e)
		{
			System.out.println("ArraySize Error");
			e.printStackTrace();
		}
		
		System.out.println("Continuing execution");
	}

}


OUTPUT:

ArraySize Error
java.lang.NegativeArraySizeException: -2
	at Pgm1b.main(Pgm1b.java:8)
Continuing execution






LAB 2B: Program to demonstrate exception handling with try, catch and finally.

import java.util.Scanner;
public class Pgm2b 
{
	public static void main(String[] args) 
	{
		int a,b;
		double c;
		Scanner in = new Scanner(System.in);
		
		System.out.println("Enter 1st number");
		a = in.nextInt();
		
		System.out.println("Enter 2nd number");
		b = in.nextInt();
		try
		{
			c = a / b;
			System.out.println("Division = " + c);
		}
		catch(ArithmeticException e)
		{
			System.out.println("Divide by zero error");
			System.out.println(e.getLocalizedMessage());
		}
		finally
		{
			System.out.println("Inside finally block");
		}
		
		System.out.println("Outside try-catch-finally block");
	}

}



OUTPUT:

Enter 1st number
6
Enter 2nd number
3
Division = 2.0
Inside finally block
Outside try-catch-finally block


Enter 1st number
5
Enter 2nd number
0
Divide by zero error
/ by zero
Inside finally block
Outside try-catch-finally block













LAB 3B: Program which create and displays a message on the window

package LabPgm3b;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class Pgm3b implements ActionListener
{
	public static void main(String[] args) 
	{
		JFrame frame = new JFrame("Original Frame");
		frame.setSize(300,300);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Pgm3b obj = new Pgm3b();
		JButton button = new JButton("View Message");
		frame.add(button);
		button.addActionListener(obj);
		frame.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent e)
	{
		JFrame sub_frame = new JFrame("Sub Frame");
		sub_frame.setSize(200,200);
		JLabel label = new JLabel("!!! HELLO !!!");
		sub_frame.add(label);
		sub_frame.setVisible(true);
	}
}








OUTPUT






























LAB 5B: Program to create a 4×4 grid and fills it in with 15 buttons, each 1 labelled with its index.

package LabPgm5b;

import java.awt.*;    
import javax.swing.*; 

public class Pgm5b 
{
	JFrame frameObj;    
	Pgm5b()  
	{    
		frameObj = new JFrame();    
		   
		JButton btn1 = new JButton("1");    
		JButton btn2 = new JButton("2");    
		JButton btn3 = new JButton("3");    
		JButton btn4 = new JButton("4");    
		JButton btn5 = new JButton("5");    
		JButton btn6 = new JButton("6");    
		JButton btn7 = new JButton("7");    
		JButton btn8 = new JButton("8");    
		JButton btn9 = new JButton("9"); 
		JButton btn10 = new JButton("10"); 
		JButton btn11 = new JButton("11"); 
		JButton btn12 = new JButton("12"); 
		JButton btn13 = new JButton("13"); 
		JButton btn14 = new JButton("14"); 
		JButton btn15 = new JButton("15"); 
		
		frameObj.add(btn1); frameObj.add(btn2); frameObj.add(btn3);  
		frameObj.add(btn4); frameObj.add(btn5); frameObj.add(btn6);  
		frameObj.add(btn7); frameObj.add(btn8); frameObj.add(btn9);
		frameObj.add(btn10);	frameObj.add(btn11);	frameObj.add(btn12);
		frameObj.add(btn13);	frameObj.add(btn14);	frameObj.add(btn15);

		frameObj.setLayout(new GridLayout(4,4));    
		frameObj.setSize(300, 300);    
		frameObj.setVisible(true);    
	}  
	  
	public static void main(String args[])   
	{    
		new Pgm5b();    
	}    
}



OUTPUT