JAVA基础学习之路（二）方法定义，重载，递归

package test;
public class test1 {
    public static void main(String args[]) {
        int result = add(10, 20);
        System.out.println(result);
　　}
    public static int add(int a, int b) {
        int c;
        c = a + b;
        return c;
    }
}

public class test1 {
    public static void main(String args[]) {
        int result_1 = add(10, 20);
        double result_2 = add(10.5, 20.5);
        int result_3 = add(10, 20, 30);
        System.out.println(result_1);
        System.out.println(result_2);
        System.out.println(result_3);
    }
    public static int add(int a, int b) {
        return a+b;        
    }
    public static double add(double a, double b) {
        return a+b;        
    }
    public static int add(int a, int b,int c) {
        return a+b+c;        
    }
    
}