Map(K,V)集合的V值是二维数组，怎么取二维数组的第2列数值

Question

public MainFram() {

Map<String, Object> aMap = new HashMap<>();{
    
    aMap.put("bj0", new int[]{0, 0});
    
    aMap.put("bm0", new int[]{0, 1});
    
    aMap.put("bx0", new int[]{0, 2});}

for (Map.Entry<String, Object> entry:aMap.entrySet()) {
    
    System.out.println(entry.getValue());
}

}

Answer 1

你这Map集合的Value 是 一维数组，你要取这个第二列数值，参考如下：

int[] arr = (int[])entry.getValue();
System.out.println(arr[1]);