下拉框、列表框

下拉框、列表框

①下拉框

源代码：

package cn.ecut.swing.box;

import javax.swing.*;
import java.awt.*;

public class JComboBoxDemo extends JFrame {
    public static void main(String[] args) {
        new JComboBoxDemo();
    }
    public JComboBoxDemo(){
        //下拉框
        JComboBox jComboBox=new JComboBox();
        jComboBox.addItem(null);
        jComboBox.addItem("Java");
        jComboBox.addItem("Linux");
        jComboBox.addItem("C++");
        Container container=this.getContentPane();
        container.add(jComboBox);
        this.setVisible(true);
        this.setBounds(100,100,400,400);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

运行结果：

②列表框

源代码：

package cn.ecut.swing.box;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class JListDemo extends JFrame {
    public static void main(String[] args) {
        new JListDemo();
    }
    public JListDemo(){
        Container container=this.getContentPane();
        //列表框
        Vector vector=new Vector();
        JList jList=new JList(vector);
        vector.add("甲");
        vector.add("乙");
        vector.add("丙");
        container.add(jList);
        this.setVisible(true);
        this.setBounds(100,100,200,200);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

运行结果：

标签：列表框,jComboBox,public,add,vector,new,import,下拉框
来源： https://blog.csdn.net/weixin_45623678/article/details/114112856