Java的GUI编程（2）--- Swing

GUI编程（二）----Swing

前言

​ Swing 是在AWT的基础上构建的一套新的图形界面系统，是JFC（Java Foundation Class）的一部分，是试图解决AWT缺点的一个尝试。它提供了AWT 所能够提供的所有功能，并且用纯粹的Java代码对AWT 的功能进行了大幅度的扩充。所有的swing组件实际上也是AWT的一部分。Swing 对基于对等体的组件使用的术语是重量级，对于模拟的组件使用的术语是轻量级。实际上，Swing 可以支持在一个 GUI 中混合使用重量级组件和轻量级组件，不过一般将其称之为轻量级组件。

1.1、窗口、面板

package com.kuang.lesson04;

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

public class JFrameDemo {

    //init(); 初始化
    public void init(){
        //顶级窗口
        JFrame jf = new JFrame("这是一个JFrame窗口");
        jf.setVisible(true);
        jf.setBounds(100,100,200,200);
        jf.setBackground(Color.cyan);
        //设置文字 Jlabel
        JLabel label = new JLabel("韩壮壮");

        jf.add(label);
		
        //关闭事件
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();
    }
}

• 标签居中

package com.kuang.lesson04;

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

public class JFrameDemo {

    //init(); 初始化
    public void init(){
        //顶级窗口
        JFrame jf = new JFrame("这是一个JFrame窗口");
        jf.setVisible(true);
        jf.setBounds(100,100,200,200);
        jf.setBackground(Color.cyan);
        //设置文字 Jlabel
        JLabel label = new JLabel("韩壮壮");

        jf.add(label);
		//文本标签居中
        label.setHorizontalAlignment(SwingConstants.CENTER);
        //关闭事件
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();
    }
}

1.2、弹窗

• JDialog，用来被弹出，默认就有关闭事件！

package com.kuang.lesson04;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//主窗口
public class DialogDemo extends JFrame {

    public DialogDemo(){
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame 放东西，容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);

        //按钮
        JButton button = new JButton("点击弹出一个对话框"); //创建
        button.setBounds(30,30,200,50);

        //点击这个按钮的时候，弹出一个弹窗
        button.addActionListener(new ActionListener() { //监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });

        container.add(button);
    }



    public static void main(String[] args) {
        new DialogDemo();
    }
}

//弹窗的窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        

        Container container = this.getContentPane();
        container.setLayout(null);

        container.add(new Label("韩壮壮带你学Java"));
    }
}

1.3、标签(label)

• 图标 ICON

package com.kuang.lesson04;

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

//图标，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;

    public IconDemo(){} //无参构造

    public IconDemo(int width,int height){
        this.width = width;
        this.height = height;
    }


    public void init(){
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签，也可以放在按钮上！
        JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }



    public static void main(String[] args) {
        new IconDemo().init();
    }


    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}

• 图片Icon

package com.kuang.lesson04;

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

public class ImageIconDemo extends JFrame {

    public ImageIconDemo(){
        //获取图片的地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("123.jpg");

        ImageIcon imageIcon = new ImageIcon(url); // //命名不要冲突了
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,200,200);
    }

    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

1.4、面板(JPanel)

• JPanel

package com.kuang.lesson05;

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

public class JPanelDemo extends JFrame {

    public JPanelDemo() {
        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,1,10,10)); //后面的参数的意思，间距


        JPanel panel1 = new JPanel(new GridLayout(1,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(3,2));

        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel2.add(new JButton("2"));
        panel2.add(new JButton("2"));
        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));


        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }


    public static void main(String[] args) {
        new JPanelDemo();
    }
}

• JScrollPanel

package com.kuang.lesson05;

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

public class JScrollDemo extends JFrame {

    public JScrollDemo(){
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20, 50);
        textArea.setText("韩壮壮");

        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

1.5、按钮

• 图片按钮

package com.kuang.lesson05;

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

public class JButtonDemo01 extends JFrame {

    public JButtonDemo01() {
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("123.jpg");
        Icon icon = new ImageIcon(resource);

        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");

        //add
        container.add(button);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

• 单选按钮

package com.kuang.lesson05;

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

public class JButtonDemo02 extends JFrame {

    public JButtonDemo02() {
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("123.jpg");
        Icon icon = new ImageIcon(resource);


        //单选框
        JRadioButton radioButton1 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton2 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton3 = new JRadioButton("JRadioButton03");

        //由于单选框只能选择一个，分组,一个组中只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);

        container.add(radioButton1,BorderLayout.CENTER);
        container.add(radioButton2,BorderLayout.NORTH);
        container.add(radioButton3,BorderLayout.SOUTH);



        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}

• 复选按钮

package com.kuang.lesson05;

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

public class JButtonDemo03  extends JFrame {

    public JButtonDemo03() {
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("123.jpg");
        Icon icon = new ImageIcon(resource);

        //多选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}

1.6、列表

• 下拉框

package com.kuang.lesson06;

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

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(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

• 列表框

package com.kuang.lesson06;

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

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("zhangsan");
        contents.add("lisi");
        contents.add("wangwu");


        container.add(jList);


        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

1.7、文本框

• 文本框

package com.kuang.lesson06;

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

public class TestTextDemo01  extends JFrame {
    public TestTextDemo01() {

        Container container = this.getContentPane();

        JTextField textField = new JTextField("hello");
        JTextField textField2 = new JTextField("world",20);

        container.add(textField,BorderLayout.NORTH);
        container.add(textField2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo01();
    }
}

• 密码框

package com.kuang.lesson06;

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

public class TestTextDemo03  extends JFrame {
    public TestTextDemo03() {

        Container container = this.getContentPane();

        //面板

        JPasswordField passwordField = new JPasswordField(); //****
        passwordField.setEchoChar('*');

        container.add(passwordField);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo03();
    }
}

• 文本域

package com.kuang.lesson05;

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

public class JScrollDemo extends JFrame {

    public JScrollDemo(){
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20, 50);
        textArea.setText("韩壮壮");

        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}