learning java AWT 常见组件

import javax.swing.*;
import java.awt.*;public class CommonComponent {
    Frame f = new Frame("test");
    Button ok = new Button("confirmed");
    CheckboxGroup cbg = new CheckboxGroup();
    Checkbox male = new Checkbox("man", cbg, true);
    Checkbox female = new Checkbox("woman", cbg,false);
    Checkbox married = new Checkbox("married?", false);    Choice colorChooser = new Choice();    List colorList = new List(,true);    TextArea ta = new TextArea(,);    TextField name = new TextField();
    public void init(){
        colorChooser.add("red");
        colorChooser.add("blue");
        colorChooser.add("green");        colorList.add("red");
        colorList.add("blue");
        colorList.add("green");        var botton = new Panel();
        botton.add(name);
        botton.add(ok);
        f.add(botton, BorderLayout.SOUTH);        var checkPannel  = new Panel();
        checkPannel.add(colorChooser);
        checkPannel.add(male);
        checkPannel.add(female);
        checkPannel.add(married);        var topLeft = Box.createVerticalBox();
        topLeft.add(ta);
        topLeft.add(checkPannel);        //f.add(topLeft);        var top = Box.createHorizontalBox();
        top.add(topLeft);
        top.add(colorList);        f.add(top);
        f.pack();
        f.setVisible(true);
    }    public static void main(String[] args) {
        new CommonComponent().init();
    }}

output: