Java Basics
If, Else And Switch: Basic Control Structures - Con't
The example below demonstrates this. If the number of clicks inside the applet matches zero, one, two or ten, you get an appropriate message, also for any other case:
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//Sourcecode
import java.awt.*;
import java.applet.*;
public class Project5C extends Applet
{
//we can initialize this variable with 0, which is not neccessary though,
//booleans are initialized with false and numbers with 0 by default
int clickNumber=0;
public boolean mouseDown(Event evt,int x,int y)
{
//increase by 1, you could also write
//clickNumber = clickNumber+1, but why should you :)
clickNumber++;
repaint();
return true;
}
public void paint(Graphics g)
{
g.setFont(new Font("Helvetica",Font.PLAIN,15));
g.drawString("Click inside the applet!", 80,30);
g.drawString("Clicks: "+clickNumber, 120,50);
//our switch statement, which tests the clickNumber variable
switch(clickNumber)
{
case 0:
g.drawString("You haven't clicked yet!",70,100);
break;
case 1:
g.drawString("You clicked once!",90,100);
break;
case 2:
g.drawString("You clicked 2 times!",80,100);
break;
case 10:
g.drawString("You clicked 10 times!",90,100);
break;
//the default statement is mandatory, it can be ommitted
default:
{
g.drawString("You clicked more than 3 times,",50,80);
g.drawString("but not 10 times!",90,100);
}
}
}
}
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