README.md

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-# java
-

w1/HelloWorld.java

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-HelloWorld

w1/README.md

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-# TemperatureConverter
-温度转换 Java 程序，实现摄氏度 ↔ 华氏度互转
-## 编译
-javac TemperatureConverter.java
-## 运行
-java TemperatureConverter

w1/TemperatureConverter.java

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-import java.util.Scanner;
-public class TemperatureConverter {
-    /**
-     * 将摄氏度转换为华氏度。
-     * @param c 摄氏温度
-     * @return 对应的华氏温度
-     */
-    public static double celsiusToFahrenheit(double c) {
-        return c * 9.0 / 5.0 + 32.0;
-    }
-    /**
-     * 将华氏度转换为摄氏度。
-     * @param f 华氏温度
-     * @return 对应的摄氏温度
-     */
-    public static double fahrenheitToCelsius(double f) {
-        return (f - 32.0) * 5.0 / 9.0;
-    }
-    public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-        // 提示用户输入，格式示例："36.6 C" 或 "97 F"
-        System.out.print("请输入要转换的温度与单位（例如 36.6 C 或 97 F）：");
-        String input = scanner.nextLine().trim();
-        if (input.isEmpty()) {
-            System.out.println("输入为空，程序退出。");
-            return;
-        }
-        String[] parts = input.split("\\s+"); // 按任意空白字符分割
-        try {
-            double value = Double.parseDouble(parts[0]);
-            String unit = (parts.length > 1) ? parts[1].toUpperCase() : "C";
-            if (unit.startsWith("C")) {
-                // 从摄氏度转换为华氏度
-                double f = celsiusToFahrenheit(value);
-                System.out.printf("%.1f °C = %.2f °F%n", value, f);
-            } else if (unit.startsWith("F")) {
-                // 从华氏度转换为摄氏度
-                double c = fahrenheitToCelsius(value);
-                System.out.printf("%.1f °F = %.2f °C%n", value, c);
-            } else {
-                System.out.println("未知单位，请使用 C 或 F。");
-            }
-        } catch (Exception e) {
-            System.out.println("输入解析失败，请按示例输入数值与单位，例如 \"36.6 C\"");
-        } finally {
-            scanner.close();
-        }
-    }
-}

w1/desktop.ini

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-[LocalizedFileNames]
-ÆÁÄ»½Øͼ 2026-03-08 211456.png=@ÆÁÄ»½Øͼ 2026-03-08 211456,0

w4/ShapeAreaCalculator.java

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-
-abstract class Shape {
-
-    public abstract double getArea();
-}
-class Circle extends Shape {
-    private double radius;
-    public Circle(double radius) {
-        if (radius <= 0) {
-            throw new IllegalArgumentException("半径必须为正数");
-        }
-        this.radius = radius;
-    }
-    @Override
-    public double getArea() {
-        return Math.PI * radius * radius;
-    }
-}
-class Rectangle extends Shape {
-    private double width;
-    private double height;
-    public Rectangle(double width, double height) {
-        if (width <= 0 || height <= 0) {
-            throw new IllegalArgumentException("宽和高必须为正数");
-        }
-        this.width = width;
-        this.height = height;
-    }
-
-    @Override
-    public double getArea() {
-        return width * height;
-    }
-}
-class Triangle extends Shape {
-    private double a;
-    private double b;
-    private double c;
-    public Triangle(double a, double b, double c) {
-        if (a <= 0 || b <= 0 || c <= 0) {
-            throw new IllegalArgumentException("边长必须为正数");
-        }
-        if (a + b <= c || a + c <= b || b + c <= a) {
-            throw new IllegalArgumentException("三边不满足三角形构成条件");
-        }
-        this.a = a;
-        this.b = b;
-        this.c = c;
-    }
-    @Override
-    public double getArea() {
-        double s = (a + b + c) / 2;
-        return Math.sqrt(s * (s - a) * (s - b) * (s - c));
-    }
-}
-class ShapeUtil {
-    public static void printArea(Shape shape) {
-        if (shape == null) {
-            System.out.println("图形对象不能为空");
-            return;
-        }
-        System.out.printf("图形面积：%.2f%n", shape.getArea());
-    }
-}
-public class ShapeAreaCalculator {
-    public static void main(String[] args) {
-        try {
-            Shape circle = new Circle(3);
-            System.out.print("圆形：");
-            ShapeUtil.printArea(circle);
-            Shape rectangle = new Rectangle(4, 5);
-            System.out.print("矩形：");
-            ShapeUtil.printArea(rectangle);
-            Shape triangle = new Triangle(3, 4, 5);
-            System.out.print("三角形：");
-            ShapeUtil.printArea(triangle);
-        } catch (IllegalArgumentException e) {
-            System.out.println("错误：" + e.getMessage());
-        }
-    }
-}

w5/ShapeAreaCalculator.java

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-
-abstract class Shape {
-
-    public abstract double getArea();
-}
-class Circle extends Shape {
-    private double radius;
-    public Circle(double radius) {
-        if (radius <= 0) {
-            throw new IllegalArgumentException("半径必须为正数");
-        }
-        this.radius = radius;
-    }
-    @Override
-    public double getArea() {
-        return Math.PI * radius * radius;
-    }
-}
-class Rectangle extends Shape {
-    private double width;
-    private double height;
-    public Rectangle(double width, double height) {
-        if (width <= 0 || height <= 0) {
-            throw new IllegalArgumentException("宽和高必须为正数");
-        }
-        this.width = width;
-        this.height = height;
-    }
-
-    @Override
-    public double getArea() {
-        return width * height;
-    }
-}
-class Triangle extends Shape {
-    private double a;
-    private double b;
-    private double c;
-    public Triangle(double a, double b, double c) {
-        if (a <= 0 || b <= 0 || c <= 0) {
-            throw new IllegalArgumentException("边长必须为正数");
-        }
-        if (a + b <= c || a + c <= b || b + c <= a) {
-            throw new IllegalArgumentException("三边不满足三角形构成条件");
-        }
-        this.a = a;
-        this.b = b;
-        this.c = c;
-    }
-    @Override
-    public double getArea() {
-        double s = (a + b + c) / 2;
-        return Math.sqrt(s * (s - a) * (s - b) * (s - c));
-    }
-}
-class ShapeUtil {
-    public static void printArea(Shape shape) {
-        if (shape == null) {
-            System.out.println("图形对象不能为空");
-            return;
-        }
-        System.out.printf("图形面积：%.2f%n", shape.getArea());
-    }
-}
-public class ShapeAreaCalculator {
-    public static void main(String[] args) {
-        try {
-            Shape circle = new Circle(3);
-            System.out.print("圆形：");
-            ShapeUtil.printArea(circle);
-            Shape rectangle = new Rectangle(4, 5);
-            System.out.print("矩形：");
-            ShapeUtil.printArea(rectangle);
-            Shape triangle = new Triangle(3, 4, 5);
-            System.out.print("三角形：");
-            ShapeUtil.printArea(triangle);
-        } catch (IllegalArgumentException e) {
-            System.out.println("错误：" + e.getMessage());
-        }
-    }
-}