java - 如何从同一个java方法返回两个多维数组？

Question

我想知道如何从同一个方法返回两个多维数组:

public static arraysReturn() {
    int [][] A={{1,2},{2,3},{4,5}};
    int [][] B={{1,2},{2,3},{4,5}};
    return A,B;
}

Answer 1

Java 不支持一次返回多个东西。

但是，您可以创建一个小类来执行此操作:

public class TwoArrays {
    public final int[][] A;
    public final int[][] B;
    public TwoArrays(int[][] A, int[][] B) {
        this.A = A;
        this.B = B;
    }
}

然后把你的方法变成这样:

public static TwoArrays arraysreturn() {
    int [][] A={{1,2},{2,3},{4,5}};
    int [][] B={{1,2},{2,3},{4,5}};
    return new TwoArrays(A,B);
}

访问值:

TwoArrays arrays = arraysreturn();
System.out.println(Arrays.toString(arrays.A)); //Due to the way java prints arrays, this is needed, but it isn't a requirement for doing other stuff with the array.
System.out.println(Arrays.toString(arrays.B));