Question

JAVA String类型的两组数组元素怎么交换

现有等长数组a、b，String[] a = new String[]{"A","B","C","D"}，String[] b = new String[]{"O","P","Q","R"}，
写一个方法，实现两个数组元素互换，并倒序存储，最终结果是数组a为{"R","Q","P","O"},数组b为{"D","C","B","A"}

Answer 1

首先两个数组的长度要一样交换才有意义，循环遍历数组
int temp; //数组是什么类型temp就定义什么类型
for(int i=0; i<ary1.length; i++){
temp = ary1[i];

ary1[i] = ary2[i];
ary2[i] = temp;
}

Answer 2

String[] a = new String[]{"A","B","C","D"};
String[] c =new String[]{"A","B","C","D"} ;
String[] b = new String[]{"O","P","Q","R"};
int indexA=a.length-1,indexa=0,indexB=b.length-1,indexb=0;
for(String s:a){
a[indexa]=b[indexB];
indexa++;indexB--;
}
for(String s:b){
b[indexb]=c[indexA];
indexb++;indexA--;
}