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ChBox2.java
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ChBox2.java
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// State change using Checkbox - 2
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/* <applet code = "ChBox2" height = 300 width = 300> </applet> */
public class ChBox2 extends Applet implements ItemListener
{
Label l1.l2;
TextField t1,t2;
Checkbox cb1,cb2,cb3;
CheckboxGroup cbg;
public void init()
{
cbg = new CheckboxGroup();
cb1 = new Checkbox("Square",cbg,false);
cb2 = new Checkbox("Cube",cbg,false);
cb3 = new Checkbox("Quad",cbg,false);
t1 = new TextField(10);
t2 = new TextField(10);
l1 = new Label("Number");
l2 = new Label("Result");
add(l1); add(t1);
add(l2); add(t2);
add(cb1); add(cb2); add(cb3);
cb1.addItemListener(this);
cb2.addItemListener(this);
cb3.addItemListener(this);
}
public void itemState(ItemEvent e)
{
int n = Integer.parseInt(t1.getText());
int res = 0;
Checkbox c = cbg.getSelectedCheckbox();
if(c == cb1)
{
res = n * n;
}
else if(c == cb2)
{
res = n * n * n;
}
else if(c == cb3)
{
res = n * n * n * n;
}
t2.setText(" ", + res);
}
}