Java图形化界面基本案例

案例:

java 复制代码
public class exer1 {
    JFrame s=new JFrame("练习");

    //菜单
    JMenuBar jMenuBar=new JMenuBar();
    JMenu wenjian=new JMenu("文件");
    JMenu bianji=new JMenu("编辑");

    JMenuItem zidong=new JMenuItem("自动换行");
    JMenuItem fuzhi=new JMenuItem("复制");
    JMenuItem zhantie=new JMenuItem("粘贴");

    JMenu geshi=new JMenu("格式");
    JMenuItem zhushi=new JMenuItem("注释");
    JMenuItem quxiao=new JMenuItem("取消注释");

    //文本域
    JTextArea text=new JTextArea(10,30);
    //列表
    String[] ss={"红色","白色","紫色"};
    JList<String> colorlist=new JList<>(ss);
    //组件
    JComboBox<String> colorselect=new JComboBox<>(ss);

    ButtonGroup bg=new ButtonGroup();
    JRadioButton b1=new JRadioButton("男",true);//默认选中
    JRadioButton b2=new JRadioButton("女",false);

    //复选框
    JCheckBox checkBox=new JCheckBox("是否已婚",true);

    //最下方
    JTextField tf=new JTextField(40);
    JButton button=new JButton("确定",new ImageIcon("D:\\idea\\project\\pro1\\exercise1\\src\\ok.png"));

    //声明鼠标右键点击的菜单
    JPopupMenu popupMenu=new JPopupMenu();
    ButtonGroup bb=new ButtonGroup();
    JRadioButtonMenuItem metal=new JRadioButtonMenuItem("metal风格");
    JRadioButtonMenuItem nimbus=new JRadioButtonMenuItem("nimbus风格");
    JRadioButtonMenuItem windows=new JRadioButtonMenuItem("windows风格");
    JRadioButtonMenuItem windoowsclassic=new JRadioButtonMenuItem("windows经典风格");
    JRadioButtonMenuItem motif=new JRadioButtonMenuItem("motif经典风格");

    public void init(){
        //开始组装
        JPanel p1=new JPanel();
        p1.add(tf);
        p1.add(button);
        s.add(p1,BorderLayout.SOUTH);

        //关于选择的组件
        JPanel selectpanel=new JPanel();
        selectpanel.add(colorselect);

        bg.add(b1);
        bg.add(b2);
        selectpanel.add(b1);
        selectpanel.add(b2);
        selectpanel.add(checkBox);

        //文本域和选择相关
        Box topleft=Box.createVerticalBox();
        topleft.add(text);
        topleft.add(selectpanel);
        //组装顶部
        Box top=Box.createHorizontalBox();
        top.add(topleft);
        top.add(colorlist);
        s.add(top);

        //开始组装顶部菜单
        geshi.add(zhushi);
        geshi.add(quxiao);
        bianji.add(zidong);
        //加横线
        bianji.addSeparator();
        bianji.add(fuzhi);
        bianji.add(zhantie);
        //加横线
        bianji.addSeparator();
        bianji.add(geshi);
        jMenuBar.add(wenjian);
        jMenuBar.add(bianji);
        s.setJMenuBar(jMenuBar);

        //组装鼠标右键菜单
        popupMenu.add(metal);
        popupMenu.add(nimbus);
        popupMenu.add(windows);
        popupMenu.add(windoowsclassic);
        popupMenu.add(motif);

        ActionListener listener=new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //当前选择的是哪种风格
                String ss=e.getActionCommand();
                try {
                    change(ss);
                } catch (UnsupportedLookAndFeelException unsupportedLookAndFeelException) {
                    unsupportedLookAndFeelException.printStackTrace();
                } catch (ClassNotFoundException classNotFoundException) {
                    classNotFoundException.printStackTrace();
                } catch (InstantiationException instantiationException) {
                    instantiationException.printStackTrace();
                } catch (IllegalAccessException illegalAccessException) {
                    illegalAccessException.printStackTrace();
                }
            }
        };
        metal.addActionListener(listener);
        nimbus.addActionListener(listener);
        windows.addActionListener(listener);
        windoowsclassic.addActionListener(listener);
        motif.addActionListener(listener);

        popupMenu.add(metal);
        popupMenu.add(nimbus);
        popupMenu.add(windows);
        popupMenu.add(windoowsclassic);
        popupMenu.add(motif);

        //添加在文本区域右键出现菜单,这个不用在判断,直接设置即可
        text.setComponentPopupMenu(popupMenu);

        //关闭程序
        s.setDefaultCloseOperation(3);

        s.pack();
        s.setVisible(true);


    }
    private void change(String command) throws UnsupportedLookAndFeelException, ClassNotFoundException, InstantiationException, IllegalAccessException {
        //定义的这个方法用来改变界面风格
        switch (command){
            case "metal风格":
                UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
                break;
            case "nimbus风格":
                UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
                break;
            case "windows风格":
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
                break;
            case "windows经典风格":
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
                break;
            case "motif风格":
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
                break;
        }
        //刷新组件的外观
        SwingUtilities.updateComponentTreeUI(s.getContentPane());
        SwingUtilities.updateComponentTreeUI(popupMenu);
        SwingUtilities.updateComponentTreeUI(jMenuBar);
    }
}
相关推荐
浮游本尊1 小时前
Java学习第22天 - 云原生与容器化
java
渣哥3 小时前
原来 Java 里线程安全集合有这么多种
java
间彧3 小时前
Spring Boot集成Spring Security完整指南
java
间彧3 小时前
Spring Secutiy基本原理及工作流程
java
Java水解4 小时前
JAVA经典面试题附答案(持续更新版)
java·后端·面试
洛小豆6 小时前
在Java中,Integer.parseInt和Integer.valueOf有什么区别
java·后端·面试
前端小张同学7 小时前
服务器上如何搭建jenkins 服务CI/CD😎😎
java·后端
ytadpole7 小时前
Spring Cloud Gateway:一次不规范 URL 引发的路由转发404问题排查
java·后端
华仔啊7 小时前
基于 RuoYi-Vue 轻松实现单用户登录功能,亲测有效
java·vue.js·后端