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872天前import java.awt.*; |
import java.awt.event.*; |
public class InnerClass { |
private Frame f; |
private TextField tf; |
public InnerClass() { |
f = new Frame("Inner classes example"); |
tf = new TextField(30); |
} |
public void launchFrame() { |
Label label = new Label("Click and drag the mouse"); |
f.add(label, BorderLayout.NORTH); |
f.add(tf, BorderLayout.SOUTH); |
f.addMouseMotionListener(new MyMouseMotionListener());/* 参数为内部类对象 */ |
f.setSize(300, 200); |
f.setVisible(true); |
} |
class MyMouseMotionListener extends MouseMotionAdapter { /* 内部类开始 */ |
public void mouseDragged(MouseEvent e) { |
String s = "Mouse dragging: x=" + e.getX() + "Y=" + e.getY(); |
tf.setText(s); |
} |
}; |
public static void main(String args[]) { |
InnerClass obj = new InnerClass(); |
obj.launchFrame(); |
} |
} |
