feat(experiment_4): 添加注册登录界面

- 新增 RegisterGUI 类实现注册登录界面
- 使用 JFormDesigner 工具设计界面布局
- 添加账户输入框、密码输入框、登录和注册按钮
- 创建 task 类作为程序入口，初始化注册登录界面

java-lesson/src/main/java/cn/vscoder/experiment_4/RegisterGUI.java

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+/*
+ * Created by JFormDesigner on Mon Apr 28 16:01:14 CST 2025
+ */
+
+package cn.vscoder.experiment_4;
+
+import java.awt.*;
+import javax.swing.*;
+
+/**
+ * @author xulongjin
+ */
+public class RegisterGUI {
+    public RegisterGUI() {
+        initComponents();
+    }
+
+    private void initComponents() {
+        // JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents  @formatter:off
+        title = new JFrame();
+        panel1 = new JPanel();
+        label1 = new JLabel();
+        tfaccount = new JTextField();
+        panel2 = new JPanel();
+        label2 = new JLabel();
+        passwordField1 = new JPasswordField();
+        panel3 = new JPanel();
+        button1 = new JButton();
+        button2 = new JButton();
+
+        //======== title ========
+        {
+            title.setTitle("\u6ce8\u518c\u767b\u5f55");
+            var titleContentPane = title.getContentPane();
+            titleContentPane.setLayout(new GridLayout(3, 1));
+
+            //======== panel1 ========
+            {
+                panel1.setLayout(null);
+
+                //---- label1 ----
+                label1.setText("\u8d26\u6237\uff1a");
+                panel1.add(label1);
+                label1.setBounds(95, 45, 40, 30);
+                panel1.add(tfaccount);
+                tfaccount.setBounds(140, 40, 255, tfaccount.getPreferredSize().height);
+
+                {
+                    // compute preferred size
+                    Dimension preferredSize = new Dimension();
+                    for(int i = 0; i < panel1.getComponentCount(); i++) {
+                        Rectangle bounds = panel1.getComponent(i).getBounds();
+                        preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
+                        preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
+                    }
+                    Insets insets = panel1.getInsets();
+                    preferredSize.width += insets.right;
+                    preferredSize.height += insets.bottom;
+                    panel1.setMinimumSize(preferredSize);
+                    panel1.setPreferredSize(preferredSize);
+                }
+            }
+            titleContentPane.add(panel1);
+
+            //======== panel2 ========
+            {
+                panel2.setLayout(null);
+
+                //---- label2 ----
+                label2.setText("\u5bc6\u7801\uff1a");
+                panel2.add(label2);
+                label2.setBounds(95, 35, 40, 30);
+                panel2.add(passwordField1);
+                passwordField1.setBounds(140, 30, 255, passwordField1.getPreferredSize().height);
+
+                {
+                    // compute preferred size
+                    Dimension preferredSize = new Dimension();
+                    for(int i = 0; i < panel2.getComponentCount(); i++) {
+                        Rectangle bounds = panel2.getComponent(i).getBounds();
+                        preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
+                        preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
+                    }
+                    Insets insets = panel2.getInsets();
+                    preferredSize.width += insets.right;
+                    preferredSize.height += insets.bottom;
+                    panel2.setMinimumSize(preferredSize);
+                    panel2.setPreferredSize(preferredSize);
+                }
+            }
+            titleContentPane.add(panel2);
+
+            //======== panel3 ========
+            {
+                panel3.setLayout(null);
+
+                //---- button1 ----
+                button1.setText("\u767b\u5f55");
+                panel3.add(button1);
+                button1.setBounds(new Rectangle(new Point(270, 25), button1.getPreferredSize()));
+
+                //---- button2 ----
+                button2.setText("\u6ce8\u518c");
+                panel3.add(button2);
+                button2.setBounds(135, 25, 78, 34);
+
+                {
+                    // compute preferred size
+                    Dimension preferredSize = new Dimension();
+                    for(int i = 0; i < panel3.getComponentCount(); i++) {
+                        Rectangle bounds = panel3.getComponent(i).getBounds();
+                        preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
+                        preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
+                    }
+                    Insets insets = panel3.getInsets();
+                    preferredSize.width += insets.right;
+                    preferredSize.height += insets.bottom;
+                    panel3.setMinimumSize(preferredSize);
+                    panel3.setPreferredSize(preferredSize);
+                }
+            }
+            titleContentPane.add(panel3);
+            title.pack();
+            title.setLocationRelativeTo(title.getOwner());
+        }
+        // JFormDesigner - End of component initialization  //GEN-END:initComponents  @formatter:on
+    }
+
+    // JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables  @formatter:off
+    private JFrame title;
+    private JPanel panel1;
+    private JLabel label1;
+    private JTextField tfaccount;
+    private JPanel panel2;
+    private JLabel label2;
+    private JPasswordField passwordField1;
+    private JPanel panel3;
+    private JButton button1;
+    private JButton button2;
+    // JFormDesigner - End of variables declaration  //GEN-END:variables  @formatter:on
+}

java-lesson/src/main/java/cn/vscoder/experiment_4/RegisterGUI.jfd

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+JFDML JFormDesigner: "8.2.4.0.393" Java: "21.0.6" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		add( new FormWindow( "javax.swing.JFrame", new FormLayoutManager( class java.awt.GridLayout ) {
+			"columns": 1
+			"rows": 3
+		} ) {
+			name: "title"
+			"title": "注册登录"
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class com.jformdesigner.runtime.NullLayout ) ) {
+				name: "panel1"
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "label1"
+					"text": "账户："
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"x": 95
+					"y": 45
+					"width": 40
+					"height": 30
+				} )
+				add( new FormComponent( "javax.swing.JTextField" ) {
+					name: "tfaccount"
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"x": 140
+					"y": 40
+					"width": 255
+				} )
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class com.jformdesigner.runtime.NullLayout ) ) {
+				name: "panel2"
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "label2"
+					"text": "密码："
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"width": 40
+					"height": 30
+					"x": 95
+					"y": 35
+				} )
+				add( new FormComponent( "javax.swing.JPasswordField" ) {
+					name: "passwordField1"
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"x": 140
+					"y": 30
+					"width": 255
+				} )
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class com.jformdesigner.runtime.NullLayout ) ) {
+				name: "panel3"
+				add( new FormComponent( "javax.swing.JButton" ) {
+					name: "button1"
+					"text": "登录"
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"x": 270
+					"y": 25
+				} )
+				add( new FormComponent( "javax.swing.JButton" ) {
+					name: "button2"
+					"text": "注册"
+				}, new FormLayoutConstraints( class com.jformdesigner.runtime.NullConstraints ) {
+					"width": 78
+					"height": 34
+					"x": 135
+					"y": 25
+				} )
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 490, 350 )
+		} )
+	}
+}

java-lesson/src/main/java/cn/vscoder/experiment_4/task.java

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+package cn.vscoder.experiment_4;
+
+public class task {
+    public static void main(String[] args) {
+        new RegisterGUI();
+    }
+}