Java -- Detailed code explanation of variable parameter list

The following code is a way to implement a variable parameter list.

    public static void printAry(Object[] objs){        for(Object obj:objs){
        System.out.print(obj+" ");
        }
        System.out.println();
    }    public static void main(String[] args) {
        printAry(new Object[]{1,2,3,4,5});
        printAry(new Object[]{"ni","hao"});

    }

Output result:

In this way, any type and number of parameters can be passed into the function. However, the above method is a relatively outdated method. After Java SE5 came out, a more convenient way was provided.

The code is as follows:

public static void printAry(Object... objs){        for(Object obj:objs){
        System.out.print(obj+" ");
        }
        System.out.println();
    }    public static void main(String[] args) {
        printAry(1,2,3,4,5);            
        printAry("ni","hao");           //无需显性的创建数组，由编译器自动填充。
        printAry(new Object[]{"ni","hao"}); //也可传入数组。
        printAry();                         //可为空
        printAry(new Integer(1),new Float(2));//可传不同类型的参数
    }

Result:

The following code is a way to implement a variable parameter list.

    public static void printAry(Object[] objs){        for(Object obj:objs){
        System.out.print(obj+" ");
        }
        System.out.println();
    }    public static void main(String[] args) {
        printAry(new Object[]{1,2,3,4,5});
        printAry(new Object[]{"ni","hao"});

    }

Output result:

In this way, any type and number of parameters can be passed into the function. However, the above method is a relatively outdated method. After Java SE5 came out, a more convenient way was provided.

The code is as follows:

public static void printAry(Object... objs){        for(Object obj:objs){
        System.out.print(obj+" ");
        }
        System.out.println();
    }    public static void main(String[] args) {
        printAry(1,2,3,4,5);            
        printAry("ni","hao");           //无需显性的创建数组，由编译器自动填充。
        printAry(new Object[]{"ni","hao"}); //也可传入数组。
        printAry();                         //可为空
        printAry(new Integer(1),new Float(2));//可传不同类型的参数
    }

Result:

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