标签：JFrame java 图形界面 awt swing add import new javax

相关链接https://www.cnblogs.com/mrdz/p/7716643.html
这里仅记录代码，详细请查看原博客.
JAVA的图形界面下有两组控件，一组是awt,一组是swing。
一般都是使用swing

1 标签

import java.awt.Color;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);
        f.setLayout(null);
        JLabel l = new JLabel("LOL文字");
        //文字颜色
        l.setForeground(Color.red);
        l.setBounds(50, 50, 280, 30);

        f.add(l);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

2 使用JLabel显示图片

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 200);
        f.setLayout(null);

        JLabel l = new JLabel();

        //根据图片创建ImageIcon对象
        ImageIcon i = new ImageIcon("e:/project/j2se/shana.png");
        //设置ImageIcon
        l.setIcon(i);
        //label的大小设置为ImageIcon,否则显示不完整
        l.setBounds(50, 50, i.getIconWidth(), i.getIconHeight());

        f.add(l);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

3 按钮

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);
        f.setLayout(null);
        JButton b = new JButton("一键秒对方基地挂");
        b.setBounds(50, 50, 280, 30);

        f.add(b);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

4 复选框

import javax.swing.JCheckBox;
import javax.swing.JFrame;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 200);
        f.setLayout(null);
        JCheckBox bCheckBox = new JCheckBox("物理英雄");
        //设置 为 默认被选中 
        bCheckBox.setSelected(true);
        bCheckBox.setBounds(50, 50, 130, 30);
        JCheckBox bCheckBox2 = new JCheckBox("魔法英雄");
        bCheckBox2.setBounds(50, 100, 130, 30);
        //判断 是否 被 选中 
        System.out.println(bCheckBox2.isSelected());

        f.add(bCheckBox);
        f.add(bCheckBox2);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

５单选框

为了实现只能选中一个，还需要用到ButtonGroup

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JRadioButton;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 200);
        f.setLayout(null);
        JRadioButton b1 = new JRadioButton("物理英雄");
        // 设置 为 默认被选中
        b1.setSelected(true);
        b1.setBounds(50, 50, 130, 30);
        JRadioButton b2 = new JRadioButton("魔法 英雄");
        b2.setBounds(50, 100, 130, 30);

        System.out.println(b2.isSelected());

        f.add(b1);
        f.add(b2);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

6 按钮组ButtonGroup

import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 240);
        f.setLayout(null);
        JRadioButton b1 = new JRadioButton("物理英雄");
        b1.setSelected(true);
        b1.setBounds(50, 50, 130, 30);
        JRadioButton b2 = new JRadioButton("魔法 英雄");
        b2.setBounds(50, 100, 130, 30);

        // 按钮分组
        ButtonGroup bg = new ButtonGroup();
        // 把b1，b2放在 同一个 按钮分组对象里 ，这样同一时间，只有一个 按钮 会被选中
        bg.add(b1);
        bg.add(b2);

        f.add(b1);
        f.add(b2);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

7 下拉框 JComboBox

import javax.swing.JComboBox;
import javax.swing.JFrame;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 240);
        f.setLayout(null);

        //下拉框出现的条目
        String[] heros = new String[] { "卡特琳娜", "库奇" };
        JComboBox cb = new JComboBox(heros);

        cb.setBounds(50, 50, 80, 30);

        f.add(cb);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

8 对话框 JOptionPane

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(580, 240);
        f.setLayout(null);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);

        int option = JOptionPane.showConfirmDialog(f, "是否 使用外挂 ？");
        if (JOptionPane.OK_OPTION == option) {
            String answer = JOptionPane.showInputDialog(f, "请输入yes，表明使用外挂后果自负");
            if ("yes".equals(answer))
                JOptionPane.showMessageDialog(f, "你使用外挂被抓住！ 封号一年！");
        }

    }
}

9 文本框 JTextField

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(new FlowLayout());

        JLabel lName = new JLabel("账号：");
        // 输入框
        JTextField tfName = new JTextField("");
        tfName.setText("请输入账号");
        tfName.setPreferredSize(new Dimension(80, 30));

        JLabel lPassword = new JLabel("密码：");
        // 输入框
        JTextField tfPassword = new JTextField("");
        tfPassword.setText("请输入密码");
        tfPassword.setPreferredSize(new Dimension(80, 30));

        f.add(lName);
        f.add(tfName);
        f.add(lPassword);
        f.add(tfPassword);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
        tfPassword.grabFocus();
    }
}

10 密码框JPasswordField

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(new FlowLayout());

        JLabel l = new JLabel("密码：");
        // 密码框
        JPasswordField pf = new JPasswordField("");
        pf.setText("&48kdh4@#");
        pf.setPreferredSize(new Dimension(80, 30));

        // 与文本框不同，获取密码框里的内容，推荐使用getPassword，该方法会返回一个字符数组，而非字符串
        char[] password = pf.getPassword();
        String p = String.valueOf(password);
        System.out.println(p);

        f.add(l);
        f.add(pf);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

11 文本域 JTextArea

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(new FlowLayout());

        JLabel l = new JLabel("文本域：");

        JTextArea ta = new JTextArea();
        ta.setPreferredSize(new Dimension(200, 150));
        //\n换行符
        ta.setText("抢人头！\n抢你妹啊抢！\n");
        //追加数据
        ta.append("我去送了了了了了了了了了了了了了了了了了了了了了了了了");
        //设置自动换行
        ta.setLineWrap(true);
        f.add(l);
        f.add(ta);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

12 进度条

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.JTextArea;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(new FlowLayout());

        JProgressBar pb = new JProgressBar();

        //进度条最大100
        pb.setMaximum(100);
        //当前进度是50
        pb.setValue(50);
        //显示当前进度
        pb.setStringPainted(true);

        f.add(pb);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

13 文件选择器 JFileChooser

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;

public class TestGUI {

    public static void main(String[] args) {

        final JFrame f = new JFrame("LOL");
        f.setLayout(new FlowLayout());
        final JFileChooser fc = new JFileChooser();
        fc.setFileFilter(new FileFilter() {

            @Override
            public String getDescription() {
                // TODO Auto-generated method stub
                return ".txt";
            }

            @Override
            public boolean accept(File f) {
                return f.getName().toLowerCase().endsWith(".txt");
            }
        });

        JButton bOpen = new JButton("打开文件");

        JButton bSave = new JButton("保存文件");

        f.add(bOpen);
        f.add(bSave);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(250, 150);
        f.setLocationRelativeTo(null);

        f.setVisible(true);

        bOpen.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                 int returnVal =  fc.showOpenDialog(f);
                 File file = fc.getSelectedFile();
                 if (returnVal == JFileChooser.APPROVE_OPTION) {
                     JOptionPane.showMessageDialog(f, "计划打开文件:" + file.getAbsolutePath());
                 }

            }
        });
        bSave.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int returnVal =  fc.showSaveDialog(f);
                File file = fc.getSelectedFile();
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                    JOptionPane.showMessageDialog(f, "计划保存到文件:" + file.getAbsolutePath());
                }
            }
        });
    }
}

面板

1 基本面板 JPanel

import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(null);

        JPanel p1 = new JPanel();
        // 设置面板大小
        p1.setBounds(50, 50, 300, 60);
        // 设置面板背景颜色
        p1.setBackground(Color.RED);

        // 这一句可以没有，因为JPanel默认就是采用的FlowLayout
        p1.setLayout(new FlowLayout());

        JButton b1 = new JButton("英雄1");
        JButton b2 = new JButton("英雄2");
        JButton b3 = new JButton("英雄3");

        // 把按钮加入面板
        p1.add(b1);
        p1.add(b2);
        p1.add(b3);

        JPanel p2 = new JPanel();
        JButton b4 = new JButton("英雄4");
        JButton b5 = new JButton("英雄5");
        JButton b6 = new JButton("英雄6");

        p2.add(b4);
        p2.add(b5);
        p2.add(b6);

        p2.setBackground(Color.BLUE);
        p2.setBounds(10, 150, 300, 60);

        // 把面板加入窗口
        f.add(p1);
        f.add(p2);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

2 ContentPanel

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);
        f.setLayout(null);
        JButton b = new JButton("一键秒对方基地挂");
        b.setBounds(50, 50, 280, 30);

        f.add(b);
        // JFrame上有一层面板，叫做ContentPane
        // 平时通过f.add()向JFrame增加组件，其实是向JFrame上的 ContentPane加东西
        // f.add等同于f.getContentPane().add(b);
        f.getContentPane().add(b);

        // b.getParent()获取按钮b所处于的容器
        // 打印出来可以看到，实际上是ContentPane而非JFrame
        System.out.println(b.getParent());

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

3 SplitPanel

import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(null);

        JPanel pLeft = new JPanel();
        pLeft.setBounds(50, 50, 300, 60);

        pLeft.setBackground(Color.RED);

        pLeft.setLayout(new FlowLayout());

        JButton b1 = new JButton("盖伦");
        JButton b2 = new JButton("提莫");
        JButton b3 = new JButton("安妮");

        pLeft.add(b1);
        pLeft.add(b2);
        pLeft.add(b3);

        JPanel pRight = new JPanel();
        JButton b4 = new JButton("英雄4");
        JButton b5 = new JButton("英雄5");
        JButton b6 = new JButton("英雄6");

        pRight.add(b4);
        pRight.add(b5);
        pRight.add(b6);

        pRight.setBackground(Color.BLUE);
        pRight.setBounds(10, 150, 300, 60);

        // 创建一个水平JSplitPane，左边是p1,右边是p2
        JSplitPane sp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, pLeft, pRight);
        // 设置分割条的位置
        sp.setDividerLocation(80);

        // 把sp当作ContentPane
        f.setContentPane(sp);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

4 JScrollPanel

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(null);
        //准备一个文本域，在里面放很多数据
        JTextArea ta = new JTextArea();
        for (int i = 0; i < 1000; i++) {
            ta.append(String.valueOf(i));
        }
        //自动换行
        ta.setLineWrap(true);
        JScrollPane sp = new JScrollPane(ta);

        f.setContentPane(sp);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

5 TabbedPanel

import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;

public class TestGUI {
    public static void main(String[] args) {

        JFrame f = new JFrame("LoL");
        f.setSize(400, 300);
        f.setLocation(200, 200);

        f.setLayout(null);

        JPanel p1 = new JPanel();
        p1.setBounds(50, 50, 300, 60);

        p1.setBackground(Color.RED);

        p1.setLayout(new FlowLayout());

        JButton b1 = new JButton("英雄1");
        JButton b2 = new JButton("英雄2");
        JButton b3 = new JButton("英雄3");

        p1.add(b1);
        p1.add(b2);
        p1.add(b3);

        JPanel p2 = new JPanel();
        JButton b4 = new JButton("英雄4");
        JButton b5 = new JButton("英雄5");
        JButton b6 = new JButton("英雄6");

        p2.add(b4);
        p2.add(b5);
        p2.add(b6);

        p2.setBackground(Color.BLUE);
        p2.setBounds(10, 150, 300, 60);

        JTabbedPane tp = new JTabbedPane();
        tp.add(p1);
        tp.add(p2);

        // 设置tab的标题
        tp.setTitleAt(0, "红色tab");
        tp.setTitleAt(1, "蓝色tab");

        ImageIcon i = new ImageIcon("e:/project/j2se/j.png");
        tp.setIconAt(0,i );
        tp.setIconAt(1,i );

        f.setContentPane(tp);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setVisible(true);
    }
}

6 CardLayerout

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class TestGUI {

    public static void main(String[] args) {
        JFrame f = new JFrame("CardLayerout");

        JPanel comboBoxPane = new JPanel();
        String buttonPanel = "按钮面板";
        String inputPanel = "输入框面板";
        String comboBoxItems[] = { buttonPanel, inputPanel };
        JComboBox<String> cb = new JComboBox<>(comboBoxItems);
        comboBoxPane.add(cb);

        // 两个Panel充当卡片
        JPanel card1 = new JPanel();
        card1.add(new JButton("按钮 1"));
        card1.add(new JButton("按钮 2"));
        card1.add(new JButton("按钮 3"));

        JPanel card2 = new JPanel();
        card2.add(new JTextField("输入框", 20));

        JPanel cards; // a panel that uses CardLayout
        cards = new JPanel(new CardLayout());
        cards.add(card1, buttonPanel);
        cards.add(card2, inputPanel);

        f.add(comboBoxPane, BorderLayout.NORTH);
        f.add(cards, BorderLayout.CENTER);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(250, 150);
        f.setLocationRelativeTo(null);
        f.setVisible(true);

        cb.addItemListener(new ItemListener() {

            @Override
            public void itemStateChanged(ItemEvent evt) {
                CardLayout cl = (CardLayout) (cards.getLayout());
                cl.show(cards, (String) evt.getItem());
            }
        });     
    }

}

标签：JFrame,java,图形界面,awt,swing,add,import,new,javax
来源： https://blog.csdn.net/LuckyMon/article/details/110220486

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