CODEWITHSUNDEEP
javaapplet
user187744
user187744

Reputation: 71

Input to an applet

Cannot understand the use of :public boolean action(Event event, Object object) { repaint(); return true ; } }. Am making an that would return the sum of two numbers. If I don't use.

Public boolean action (Event event, Object object) {

repaint();

return true ;

I can enter the number in the text field but it won't generate the sum. Why?

}}

import java.awt.*;

import java.applet .*;

public class user extends Applet{

TextField text1,text2;

public void init(){

text1=new TextField(8);

text2=new TextField(8);

add(text1);

add(text2);

text1.setText("0");

text2.setText("0");}

public void paint(Graphics g){

int x =0,y=0,z=0;

String s1,s2,s ;

g.Drawstring("input a no in.each box",10,50);

try{

s1=text1.getText();

x=Integer.parseInt(s1);

s2=text1.getText();

y=Integer.parseInt(s2); 

}

catch(Exception e){} 

z=x +y ;

s=String.valueOf(z);

g.drawString("The sum is:",10,75);

g.drawString(s,100,75);

}

public Boolean action (Event event, Object object ) 

{

repaint();

return true ;

}}

Upvotes: 0

Views: 147

Answers (2)

andrewdleach
andrewdleach

Reputation: 2466

You're returning a Boolean wrapper object instead of a primitive Boolean. Change your return type to 'boolean' (Lowercase)

Upvotes: 1

tddmonkey
tddmonkey

Reputation: 21184

You need to change this line:

public Boolean action (Event event, Object object )

to this:

public boolean action (Event event, Object object )

Note the lowercase b in boolean. Boolean and boolean are not the same thing.

Upvotes: 2

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