java - 有人可以向我解释一下发生了什么事吗？有很多事情正在发生，我还没有被教导过

Question

public class Main {

    public static void main(String[] args) {
     int[] x = {1, 2, 3};
     increase(x);
     Reverse rev = new Reverse();
     rev.reverse(x);
     System.out.println(x[0] + " " + x[1] + " " + x[2]);
   }

   //Increase every element in the array by 1
   //For example: array : 0, 1, 2 will become 1, 2, 3
   public static void increase(int[] a) {
       //TODO: FILL ME
   }
}

class Reverse {
     //Reverse the array
     //For example: array 0, 1, 2 will become 2, 1, 0
     public void reverse(int[] a) {
           //TODO: FILL ME
     }
}

增加什么(x)；做 ？基本上我必须填写他写的地方。但是当我什至不明白发生了什么时，这有点困难。

Answer 1

目前 increase() 暂时不执行任何操作。
您的任务是以增加数组每个单元格内容的方式编写该方法的内容。

你的代码是做什么的？

 int[] x = {1, 2, 3}; // Create an array with 3 elements, "1", "2" and "3"
 increase(x); // Call the increase() method which for now does nothing
 Reverse rev = new Reverse(); // Create an instance of the Reverse class, which contains a method to reverse arrays (but does nothing for now)
 rev.reverse(x); // Call the famous reverse() method.
 System.out.println(x[0] + " " + x[1] + " " + x[2]); //Print the content of you array x[0] is the first cell, x[1] the second, etc.