Java如何重載方法？

在Java中，如何重載方法？

此示例顯示根據參數的類型和數量重載方法。

package com.zaixian;

class MyClass {
    int height;

    MyClass() {
        System.out.println("bricks");
        height = 0;
    }

    MyClass(int i) {
        System.out.println("Building new House that is " + i + " feet tall");
        height = i;
    }

    void info() {
        System.out.println("House is " + height + " feet tall");
    }

    void info(String s) {
        System.out.println(s + ": House is " + height + " feet tall");
    }
}

public class MethodOverloading {
    public static void main(String[] args) {
        MyClass t = new MyClass(0);
        t.info();
        t.info("overloaded method");

        // Overloaded constructor:
        new MyClass();
    }
}

執行上面示例代碼，得到以下結果 -

Building new House that is 0 feet tall
House is 0 feet tall
overloaded method: House is 0 feet tall
bricks

示例-2

package com.zaixian;

public class MethodOverloading2 {
    void sum(int a, int b) {
        System.out.println(a + b);
    }

    void sum(int a, int b, int c) {
        System.out.println(a + b + c);
    }

    public static void main(String args[]) {
        MethodOverloading2 cal = new MethodOverloading2();
        cal.sum(200, 130, 260);
        cal.sum(20, 30);
    }
}

執行上面示例代碼，得到以下結果 -

590
50