A Whole Program

import java.io.*;

public class Rectangle{

public int width;

public int length;

public Rectangle(int side1, int side2) {

width = side1;

length = side2;

}

public int area() {

return(length * width);

}

}

Indicate that we want to be

be able to use any class

in package java.io

Note: java.lang is always

automatically imported.

That�s where

system.out.println comes

from, for example

Previous slide

Next slide

Back to first slide

View graphic version