[JavaSwing练习] 第一天:JFrame,JPanel,JTabbedPane图集

有一个不错的点子(制作周期大概半个月), 这次完全想靠自己肝出来, 首先得会一种GUI, 思来想去, 那就用JavaSwing吧, 顺便把这学期的Java课设作为作品的一个小分支(日常水课设), 先熟悉几天之后会用到的JavaSwing容器/组件吧...

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JFrame

myWindow.java

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

public class myWindow extends JFrame{
    JPanel panel = new JPanel();
    JButton btn = new JButton("To New World!→");
    myWindow(){
        this.setTitle("My Window");
        this.setSize(400, 400);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        panel.add(btn);
        btn.setFont(new Font(null, Font.PLAIN, 30));
        btn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                showNewWindow();
            }
        });

        this.setContentPane(panel);
        this.setVisible(true);
    }

    public void showNewWindow(){
        JFrame newJFrame = new JFrame("new window");//名字
        newJFrame.setFont(new Font(null, Font.PLAIN, 30));//字体
        newJFrame.setSize(250, 250);//大小
        newJFrame.setResizable(false);//大小不可变
        newJFrame.setLocationRelativeTo(this);//位置
        newJFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);//只关闭新窗口

        JPanel panel = new JPanel(new GridLayout(1,1));

        JLabel label = new JLabel("你所处的是新世界");
        label.setFont(new Font(null, Font.PLAIN, 30));
//        label.setHorizontalAlignment(SwingConstants.CENTER);
//        label.setVerticalAlignment(SwingConstants.CENTER);
        panel.add(label);

        newJFrame.setContentPane(panel);
        newJFrame.setVisible(true);
    }

}

JPanel

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


public class Main {
    public static void main(String[] args) {
        JFrame jf = new JFrame("用户登录");
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //使用默认的浮动布局
        JPanel panel01 = new JPanel();
        panel01.add(new JLabel("用户名"));
        panel01.add(new JTextField(10));

        JPanel panel02 = new JPanel();
        panel02.add(new JLabel("密   码"));
        panel02.add(new JPasswordField(10));

        //使用浮动布局, 且容器中组件居中显示
        JPanel panel03 = new JPanel(new FlowLayout(FlowLayout.CENTER));
        panel03.add(new JButton("登录"));
        panel03.add(new JButton("注册"));

        // 创建一个垂直盒子容器
        Box vBox = Box.createVerticalBox();
        vBox.add(panel01);
        vBox.add(panel02);
        vBox.add(panel03);

        jf.setContentPane(vBox);
        jf.setLocationRelativeTo(null);
        jf.setSize(300, 200);
        jf.setVisible(true);
    }

}

JTabbedPane

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

public class Main {

    public static void main(String[] args) {
        JFrame jf = new JFrame("photo");
        jf.setSize(300, 300);
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jf.setLocationRelativeTo(null);

        // 创建选项卡面板
        final JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.setFont(new Font(null, Font.PLAIN, 30));
        tabbedPane.addTab("Tab01", createTextPanel(1));
        tabbedPane.addTab("Tab02", createTextPanel(2));
        tabbedPane.addTab("Tab03",  createTextPanel(3));
        tabbedPane.addTab("Tab04", createTextPanel(4));
        tabbedPane.addTab("Tab05", createTextPanel(5));
        tabbedPane.addTab("Tab06",  createTextPanel(6));
        tabbedPane.addTab("Tab07", createTextPanel(7));
        tabbedPane.addTab("Tab08", createTextPanel(8));
        tabbedPane.addTab("Tab09",  createTextPanel(9));

        // 添加选项卡选中状态改变的监听器
        tabbedPane.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent e) {
                System.out.println("当前选中的是: " + tabbedPane.getSelectedIndex());
            }
        });

        // 设置默认选中的选项卡
        tabbedPane.setSelectedIndex(5);
        jf.setContentPane(tabbedPane);
        jf.setVisible(true);
    }


    // 创建一个面板，面板中心显示一个标签表示选项卡需要显示的内容
    private static JComponent createTextPanel(int num) {
        // 1 * 1 的网格布局
        JPanel panel = new JPanel(new GridLayout(1, 1));
        JLabel label = new JLabel();
        label.setIcon(new ImageIcon(num+".jpg"));

        label.setFont(new Font(null, Font.PLAIN, 50));
        label.setHorizontalAlignment(SwingConstants.CENTER);

        // 添加标签到面板
        panel.add(label);
        return panel;
    }
}