通过鼠标移动到按钮上更改背景色案例
通过鼠标移动到按钮上更改背景色案例
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public classFrameDemo {
public static void main(String[] args) {
// 创建窗体对象
final Frame f = new Frame("更改背景色");
// 设置窗体属性和布局
f.setBounds(400,200, 400, 300);
f.setLayout(new FlowLayout());
// 创建四个按钮
ButtonredButton = newButton("红色");
ButtongreenButton = newButton("绿色");
ButtonbuleButton = newButton("蓝色");
// 添加按钮
f.add(redButton);
f.add(greenButton);
f.add(buleButton);
// 设置窗体关闭
f.addWindowListener(new WindowAdapter() {
@Override
public voidwindowClosing(WindowEvent e) {
System.exit(0);
}
});
// 对按钮添加动作事件
// redButton.addActionListener(new ActionListener() {
// @Override
// public void actionPerformed(ActionEvent e) {
// f.setBackground(Color.RED);
// }
// });
// 对按钮添加鼠标点击事件
// redButton.addMouseListener(new MouseAdapter() {
// @Override
// public void mouseClicked(MouseEvent e) {
// f.setBackground(Color.RED);
// }
// });
// 对按钮添加鼠标的进入事件
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
f.setBackground(Color.RED);
}
});
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
f.setBackground(Color.WHITE);
}
});
greenButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvente) {
f.setBackground(Color.GREEN);
}
});
greenButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvente) {
f.setBackground(Color.WHITE);
}
});
buleButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvente) {
f.setBackground(Color.BLUE);
}
});
buleButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvente) {
f.setBackground(Color.WHITE);
}
});
// 设置窗体显示
f.setVisible(true);
}
}