输入输出

    Scanner scan = new Scanner(System.in);
        
        String[] str = scan.nextLine().split(" "); //字符串以空格分割
        scan.close();
        
        int[] num = new int[str.length];
        
        for(int i=0;i<str.length;i++)
            num[i] = Integer.parseInt(String.valueOf(str[i]));//将字符串的数字保存到整型数组里
        

String https://www.w3cschool.cn/java/java-string.html

数组和数组工具类Array:https://www.runoob.com/java/java-array.html

Scanner:https://www.runoob.com/java/java-scanner-class..html