做了个计算器

test/GUItest/.vscode/settings.json

@@ -3,5 +3,6 @@
     "java.project.outputPath": "bin",
     "java.project.referencedLibraries": [
         "lib/**/*.jar"
-    ]
+    ],
+    "java.jdt.ls.vmargs": "-XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -Dsun.zip.disableMemoryMapping=true -Xmx2G -Xms100m -Xlog:disable"
 }

test/GUItest/MANIFEST.MF

@@ -1,2 +0,0 @@
-Manifest-Version: 1.0
-Main-Class: Shutdown.Main

test/GUItest/src/Calculator/Main.java

@@ -0,0 +1,7 @@
+package Calculator;
+
+public class Main {
+    public static void main(String[] args) {
+        new MyFrame();
+    }
+}

test/GUItest/src/Calculator/MyFrame.java

@@ -0,0 +1,86 @@
+package Calculator;
+
+import java.awt.Button;
+import java.awt.Dialog;
+import java.awt.FlowLayout;
+import java.awt.Frame;
+import java.awt.Label;
+import java.awt.TextField;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class MyFrame extends Frame {
+    public MyFrame() {
+        super("Calculator");
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                System.exit(0);
+            }
+        });
+        setVisible(true);
+        setBounds(400, 400, 300, 200);
+        TextField num1 = new TextField();
+        TextField num2 = new TextField();
+        Button equal2 = new Button("=");
+        TextField goal = new TextField();
+        setLayout(new FlowLayout());
+        setResizable(false);
+        add(num1);
+        add(num2);
+        add(equal2);
+        add(goal);
+        equal2.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                try {
+                    goal.setText(add(Double.valueOf(num1.getText()), Double.valueOf(num2.getText())));
+                    try {
+                        goal.setText(add(Integer.valueOf(num1.getText()), Integer.valueOf(num2.getText())));
+                    } catch (java.lang.NumberFormatException event) {
+                        // TODO: handle exception
+                    }
+                } catch (java.lang.NumberFormatException event) {
+                    // TODO: handle exception
+                    CreateWarning(num1, num2, goal);
+                }
+            }
+        });
+    }
+
+    public void CreateWarning(TextField num1, TextField num2, TextField goal) {
+        Dialog warning = new Dialog(this, "please enter a valid number! ");
+        warning.setLayout(new FlowLayout());
+        Button close = new Button("close");
+        close.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // TODO Auto-generated method stub
+                warning.dispose();
+            }
+        });
+        warning.setSize(400, 0);
+        warning.setVisible(true);
+        warning.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                warning.dispose();
+            }
+        });
+        num1.setText("");
+        num2.setText("");
+        goal.setText("");
+    }
+
+    public String add(double num1, double num2) {
+        return String.valueOf(num1 + num2);
+    }
+
+    public String add(int num1, int num2) {
+        return String.valueOf(num1 + num2);
+    }
+}

test/GUItest/src/loginWindow/CenterPanel.java

@@ -0,0 +1,26 @@
+package loginWindow;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class CenterPanel extends Panel {
+    public CenterPanel() {
+        setLayout(new GridLayout(3, 1));
+        TextField UserName = new TextField();
+        TextField Password = new TextField();
+        Button commit = new Button("commit");
+        Password.setEchoChar('*');
+        add(UserName);
+        add(Password);
+        add(commit);
+        commit.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                // TODO Auto-generated method stub
+                System.out.println("Username: \t" + UserName.getText());
+                System.out.println("Password: \t" + Password.getText());
+            }
+        });
+    }
+}

test/GUItest/src/loginWindow/Main.java

@@ -0,0 +1,7 @@
+package loginWindow;
+
+public class Main {
+    public static void main(String[] args) {
+        new MyFrame();
+    }
+}

test/GUItest/src/loginWindow/MyFrame.java

@@ -0,0 +1,23 @@
+package loginWindow;
+
+import java.awt.*;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class MyFrame extends Frame {
+    public MyFrame() {
+        setVisible(true);
+        setBounds(200, 200, 680, 400);
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                // TODO Auto-generated method stub
+                System.exit(0);
+            }
+        });
+        setLayout(new BorderLayout());
+        add(new SidePanel((int)(getWidth()*0.2),getHeight()), BorderLayout.WEST);
+        add(new CenterPanel(), BorderLayout.CENTER);
+        add(new SidePanel((int)(getWidth()*0.2),getHeight()), BorderLayout.EAST);
+    }
+}

test/GUItest/src/loginWindow/SidePanel.java

@@ -0,0 +1,10 @@
+package loginWindow;
+
+import java.awt.*;
+
+public class SidePanel extends Panel {
+    public SidePanel(int width, int height) {
+        setBackground(new Color(0X39, 0XC5, 0XBB));
+        setSize(width, height);
+    }
+}