实现功能: 窗体居中,多选框,下拉框,按钮,点击按钮关闭
- import java.awt.Button;
- import java.awt.Checkbox;
- import java.awt.Choice;
- import java.awt.Dimension;
- import java.awt.Frame;
- import java.awt.GridLayout;
- import java.awt.Label;
- import java.awt.List;
- import java.awt.Toolkit;
- import java.awt.event.ActionEvent;
- import java.awt.event.ActionListener;
- public class test {
- public static void main(String[] args) {
- Frame frame =new Frame("My first windows");
- int windowWidth = frame.getWidth(); //获得窗口宽
- int windowHeight = frame.getHeight(); //获得窗口高
- Toolkit kit = Toolkit.getDefaultToolkit(); //定义工具包
- Dimension screenSize = kit.getScreenSize(); //获取屏幕的尺寸
- int screenWidth = screenSize.width; //获取屏幕的宽
- int screenHeight = screenSize.height; //获取屏幕的高
- frame.setLocation(screenWidth/2-windowWidth/2, screenHeight/2-windowHeight/2);//设置窗口居中显示
- frame.setLayout(new GridLayout(7,1));
- //lable组件
- frame.add(new Label("复选 (可复选):"));
- //checkbox组件
- frame.add(new Checkbox("被耍了"));
- frame.add(new Checkbox("并没有"));
- //Choice 组件
- Choice c=new Choice();
- c.add("Red");
- c.add("Green");
- c.add("Blue");
- frame.add(c);
- //List组件
- List l=new List(3,false);
- l.add("一年级");
- l.add("二年级");
- l.add("三年级");
- frame.add(l);
- //Button组件
- Button button= new Button("关闭按钮");
- button.addActionListener(new ActionListener() {
- @Override
- public void actionPerformed(ActionEvent e) {
- System.exit(0);//退出程序
- }
- });
- frame.add(button);
- frame.pack();//调整窗口以容纳所有的组件
- frame.setVisible(true);//显示窗口
- }
- }