做了个计算器

2024-06-22 01:42:41 +08:00
parent 3a1a7a2005
commit 44fe8b49ed
8 changed files with 161 additions and 3 deletions
@@ -0,0 +1,7 @@
+package Calculator;
+
+public class Main {
+    public static void main(String[] args) {
+        new MyFrame();
+    }
+}
@@ -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);
+    }
+}