Java可变参数的应用小结

public class VaiParameter01 {
    public static void main(String[]args){
    Methods m= new Methods();
    System.out.println(m.sum(1,5,100));
    System.out.println(m.sum(1,5,100，55));
    }
}
class Methods{
    //计算2/3/4个数的和
    //可以使用方法重载
    public int sum(int n1,int n2,int n3){
        return n1+n2+n3;
    }
    public int sum(int n1,int n2,int n3，int 4){
        return n1+n2+n3+n4;
    }
}

public class VaiParameter01 {
    public static void main(String[]args){
    Methods m= new Methods();
    System.out.println(m.sum(1,5,100));
    }
}
class Methods{
    //使用可变参数优化
    //1.int... 接受的是可变参数，类型是int ，即可接收多个int（0-多）
    //2.使用可变参数时，可以当作数组来使用，把nums看作数组
    //3.遍历nums求和即可
    public int sum(int...nums){
        //System.out.println("接受的参数的个数="+nums.length);
        int res=0;
        for(int i=0;i<nums.length;i++){
            res+=nums[i];
        }
        return res;
    }
}

public class VarParametersExercise {
    public static void main(String[]args){
    Method methods= new Method();
    System.out.println( methods.showScore("xiaomin",90,45.56,32,12,45,75));
    }
}
class Method{
       public String showScore(String name,double...score){
        double totalscore=0;
        for(int i=0;i<score.length;i++){
            totalscore+=score[i];
        }
        return name+" score="+totalscore;
    }
}