Swing—列表(下拉框，列表框)

Swing—列表(下拉框，列表框)

下拉框

应用场景：选择地区，或者一些单个选项

package com.deng.lesson06;

import javax.swing.*;
import java.awt.*;
//下拉框
public class TestComboboxDemo01 extends JFrame {
    public TestComboboxDemo01(){
        Container container = this.getContentPane();
        JComboBox status = new JComboBox();

        status.addItem(null);
        status.addItem("正在热映");
        status.addItem("已下架");
        status.addItem("即将上映");

        container.add(status);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

列表框

应用场景：列表，展示信息，一般是动态扩容!

package com.deng.lesson06;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;
//列表框
public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){
        Container container = this.getContentPane();
        //生成列表的内容
       // String[] contents = {"1","2","3"};
        Vector contents = new Vector();
        //列表中需要放入内容
        JList jList = new JList(contents);
        contents.add("欢迎光临");
        contents.add("下次再来");

        container.add(jList);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}