import javax.swing.*;
import java.awt.*;
public class RegionFrame extends JFrame
{
JLabel lblRegName=null ;
JLabel lblDistName=nul l;
JLabel lblRegionForm=n ull;
JLabel lblStatName=nul l;
JTextField txtRegName=null ;
JTextField txtDistName=nul l;
JButton butAdd=null;
JButton butUpdate=null;
JComboBox cmbSta=null;
public RegionFrame()
{
Container cont=getContent Pane();
cont.setLayout( null);
lblRegionForm=n ew JLabel("Region" );
lblDistName=new JLabel("Distric t Name");
lblRegName=new JLabel("Region Name");
txtDistName=new JTextField(25);
txtRegName=new JTextField(25);
butAdd=new JButton("Add");
butUpdate=new JButton("Update ");
cmbSta=new JComboBox();
cont.add(lblDis tName);
cont.add(txtDis tName);
lblDistName.set Bounds(50,50,12 0,25);
txtDistName.set Bounds(180,50,1 50,25);
cont.add(lblReg Name);
cont.add(txtReg Name);
lblRegName.setB ounds(50,150,12 0,25);
txtRegName.setB ounds(180,150,1 50,25);
cont.add(lblSta tName);
cont.add(cmbSta );
lblStatName.set Bounds(50,150,1 20,25);
cmbSta.setBound s(180,150,150,2 5);
cont.add(butAdd );
cont.add(butUpd ate);
butAdd.setBound s(100,125,80,25 );
butUpdate.setBo unds(200,125,80 ,25);
setVisible(true );
pack();
setSize(600,400 );
}
public static void main(String ar[])
{
new RegionFrame();
}
}
Exception in thread "main" java.lang.NullP ointerException
at java.awt.Contai ner.addImpl(Con tainer.java:621 )
at java.awt.Contai ner.add(Contain er.java:307)
at RegionFrame.<in it>(RegionFrame .java:44)
at RegionFrame.mai n(RegionFrame.j ava:60)