我构建的Java代码有两个方法，其中有3个数组，第一个方法的3个数组在调用后会相应地更新，调用第二个方法后，第一个方法中发生的更改不会在第二个方法中表示。
例如：

public class ticket_reservation {

    public static int [][] method1(){
        int [] array1 = { 1, 2, 3};
        int [] array2 = { 4, 5, 6, 7};
        int [] array3 = { 8, 9, 10, 11, 12};

        //code that involve the above 3 arrays

        int [][] array = { array1, array2, array3};
    
        return array;
    }

    public static int [][] method2(){
        int [] array1 = { 1, 2, 3};
        int [] array2 = { 4, 5, 6, 7};
        int [] array3 = { 8, 9, 10, 11, 12};
    
        //code that involve the above 3 arrays
    
        int [][] array = { array1, array2, array3};
    
        return array;
   }

    public static void main(String [] args) {
        int [] array1 = { 1, 2, 3};
        int [] array2 = { 4, 5, 6, 7};
        int [] array3 = { 8, 9, 10, 11, 12};

        int [][] method1_array = method1();

        //code to make the 2D method1_array into 3 single dimention arrays
    
        int [][] method2_array = method2();
    
        //code to make the 2D method2_array into 3 single dimention arrays
    
        //this is where the problem arise. as the changes i made in the first method don't 
        //show in the second method
   }
}

我发现很难在这里找到解决方案，因为我希望我在第一个方法中所做的更改也能在第二个方法中进行。我试图在不使用数组的情况下用方法编写代码，但发现很困难。