BCA Slip27 Java

Java

Slip27

Q.1) Write a java program to accept the details employee (Eno, Ename ,Salary) and add it into the JTable by clicking on the Button.(Max : 5 Records) [Marks30] 

Solution

Emp.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Emp extends JFrame implements ActionListener
{
JButton b1 = new JButton("Add");
JButton b2 = new JButton("Close");
JLabel l1 = new JLabel("Eno :");
JLabel l2 = new JLabel("Ename :");
JLabel l3 = new JLabel("Salary :");
Jtable obj = new Jtable();
int count = 0;
JTextField t1 = new JTextField(20);
JTextField t2 = new JTextField(20);
JTextField t3 = new JTextField(20);
Emp() throws Exception
{
setLayout(new GridLayout(4,2));
b1.addActionListener(this);
b2.addActionListener(this);
add(l1); add(t1);
add(l2); add(t2);
add(l3); add(t3);
add(b1); add(b2);
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource() == b1)
{
  if(count == 5)
  {
  JOptionPane.showMessageDialog(null,"Maximum Records are only 5","Failed",JOptionPane.INFORMATION_MESSAGE);
                return;
  }  
  count++;
  
  obj.add(t1.getText(),t2.getText(), t3.getText());
  
}

else
  System.exit(0);
}
public static void main(String ar[]) throws Exception
{
Emp e = new Emp();
e.show();
}
}



Slip27_2.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class MyThread extends Thread
{
JTextField tf;
MyThread(JTextField tf)
{
this.tf = tf;
}
public void run()
{
while(true)
{
Date d = new Date();
int h = d.getHours();
int m = d.getMinutes();
int s = d.getSeconds();
tf.setText(h+":"+m+":"+s);
try
{
Thread.sleep(300);
}
catch(Exception e){}
}
}
}
class Slip27_2 extends JFrame implements ActionListener
{
JTextField txtTime;
JButton btnStart,btnStop;
MyThread t;
Slip27_2()
{
txtTime = new JTextField(20);
btnStart = new JButton("Start");
btnStop = new JButton("Stop");
setTitle("Stop Watch");
setLayout(new FlowLayout());
setSize(300,100);
add(txtTime);
add(btnStart);
add(btnStop);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
btnStart.addActionListener(this);
btnStop.addActionListener(this);
t = new MyThread(txtTime);
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==btnStart)
{
if(!t.isAlive()) t.start();
else t.resume();
}
if(ae.getSource()==btnStop)
{
t.suspend();
}
}
public static void main(String a[])
{
new Slip27_2();
}

}

Jtable.java

import java.awt.*;

import javax.swing.*;

import java.sql.*;

/*

  JTable

*/

class Jtable extends JFrame

{

private JTable table;

private JScrollPane scrollPane;

Object[][] data= new Object[5][3];

String colNames[] = {"Eno","Ename","Salary"};

int i;

Jtable()throws Exception

{

setTitle( "JTable Application" );

setSize( 300, 200 );

setBackground( Color.gray );

    

    

    table=new JTable(data,colNames);

    

    scrollPane = new JScrollPane( table );

    getContentPane().add(  scrollPane );

    setVisible(true);

  }

  void add(String s1,String s2, String s3)

  {

  data[i][0] = s1;

  data[i][1] = s2;

  data[i][2] = s3;

  i++;

 

  //table=new JTable(data,colNames);

  //scrollPane = new JScrollPane( table );

//getContentPane().add(  scrollPane );

  }

  

  

}