icancount.java

书籍"Java_面向事件编程"的附带光盘代码

import objectdraw.*;
import java.awt.*;

    // A program to count as high as you can click.
public class ICanCount extends WindowController {

                                // Where to display the instructions
    private static final Location INSTR_POS = new Location( 20, 100);

    private int theCount = 0;   // how high we have counted

        // Create the Text to display the current count
    public void begin() {
        new Text( "Click to make me count", INSTR_POS, canvas );
    }

        // Increase the count with each click
    public void onMouseClick(Location point) {
        theCount = theCount + 1;
        System.out.println( theCount );
    }
}