Question

java定义一个4行4列的二维数组。第一行和第4行数据进行交换 刚学不太懂！感谢大佬们！！

Answer 1

// java定义一个4行4列的二维数组。第一行和第4行数据进行交换 刚学不太懂！感谢大佬们！！
String[][] inarr = {{"A1","A2","A3","A3"},{"B1","B2","B3","B4"},{"C1","C2","C3","C4"},{"D1","D2","D3","D4"}};

String[] temp = {};
temp = inarr[0];
inarr[0] = inarr[3];
inarr[3] = temp;

// end

Answer 2

for(int i=0;i<4;i++){
a=arr[0][i];
arr[3][i]=arr[0][i];
arr[0][i]=a;}

搞定

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感谢！