Java可变参数讲解

如果实现的多个方法，这些方法里面逻辑基本相同，唯一不同的是传递的参数的个数，可以使用可变参数
可变参数的定义方法 数据类型...数组的名称,这个数组存储传递过来的参数,类似JavaScript
注意点：
        （1）可变参数需要写在方法的参数列表中，不能单独定义
        （2）在方法的参数列表中只能有一个可变参数
        （3）方法的参数列表中的可变参数，必须放在参数最后
           　　 - score(String name, int...args)

case：

public class ChangeableArgs {

    public static void main(String[] args) {
        score("小明",90,80,70,90);
        score("小红",90,80,70,90,100,200,300);
        System.out.println(add(90,80,70,90));
        System.out.println(add(90,80,70,90,100,200,300));
    }

    private static void score(String name, int...args) {
        int result=0;
        for(int i=0;i<args.length;i++)
            result+=args[i];
        System.out.println(name+"考了"+result+"分！");
    }
    private static int add(int...args) {
        int result=0;
        for(int i=0;i<args.length;i++)
            result+=args[i];
        return result;
    }
}

运行截图：

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