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  • 图形界面系列教材 (六)- Swing 四种常见面板

    步骤1:基本面板
    步骤2:ContentPane
    步骤3:SplitPanel
    步骤4:JScrollPanel
    步骤5:TabbedPanel
    步骤6:CardLayerout
    步骤7:练习-SplitPanel
    步骤8:答案-SplitPanel
    步骤9:练习-按照eclipse的风格显示多个java文件
    步骤10:答案-按照eclipse的风格显示多个java文件

    示例 1 : 基本面板

    JPanel即为基本面板 
    面板和JFrame一样都是容器,不过面板一般用来充当中间容器,把组件放在面板上,然后再把面板放在窗体上。 
    一旦移动一个面板,其上面的组件,就会全部统一跟着移动,采用这种方式,便于进行整体界面的设计

    基本面板

    package gui;

    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(400300);

            f.setLocation(200200);

            f.setLayout(null);

            JPanel p1 = new JPanel();

            // 设置面板大小

            p1.setBounds(505030060);

            // 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(1015030060);

            // 把面板加入窗口

            f.add(p1);

            f.add(p2);

            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            f.setVisible(true);

        }

    }

    示例 2 : ContentPane

    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

    package gui;

    import javax.swing.JButton;

    import javax.swing.JFrame;

    public class TestGUI {

        public static void main(String[] args) {

            JFrame f = new JFrame("LoL");

            f.setSize(400300);

            f.setLocation(200200);

            f.setLayout(null);

            JButton b = new JButton("一键秒对方基地挂");

            b.setBounds(505028030);

            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);

        }

    }

    示例 3 : SplitPanel

    创建一个水平JSplitPane,左边是pLeft,右边是pRight

    SplitPanel

    package gui;

      

    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(400300);

            f.setLocation(200200);

      

            f.setLayout(null);

      

            JPanel pLeft = new JPanel();

            pLeft.setBounds(505030060);

      

            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(1015030060);

      

            // 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);

        }

    }

    示例 4 : JScrollPanel

    使用带滚动条的面板有两种方式
    1. 在创建JScrollPane,把组件作为参数传进去

    JScrollPane sp = new JScrollPane(ta);


    2. 希望带滚动条的面板显示其他组件的时候,调用setViewportView

    sp.setViewportView(ta);

    JScrollPanel

    package gui;

    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(400300);

            f.setLocation(200200);

            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);

        }

    }

    示例 5 : TabbedPanel

    TabbedPanel

    package gui;

      

    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(400300);

            f.setLocation(200200);

      

            f.setLayout(null);

      

            JPanel p1 = new JPanel();

            p1.setBounds(505030060);

      

            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(1015030060);

      

            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);

        }

    }

    示例 6 : CardLayerout

    CardLayerout 布局器 很像TabbedPanel ,在本例里面上面是一个下拉框,下面是一个CardLayerout 的JPanel
    这个JPanel里有两个面板,可以通过CardLayerout方便的切换

    CardLayerout

    package gui;

    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(250150);

            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());

                }

            });     

        }

             

    }


    更多内容,点击了解: https://how2j.cn/k/gui/gui-panel/406.html

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  • 原文地址:https://www.cnblogs.com/Lanht/p/12615450.html
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