Question

JAVA对当前两个字符串内容怎么进行互换？

String s1="uSSSCCsdfgsdAX@$#67";
String s2="sssdCCsdfGSDAX@$#67";
对当前两个字符串内容进行互换

Answer 1

定义第三个字符串变量：
String s1="uSSSCCsdfgsdAX@$#67";
String s2="sssdCCsdfGSDAX@$#67";
String s3="";
s3=s1;
s1=s2;
s2=s3;
使用StringBuffer:
String s1 = "uSSSCCsdfgsdAX@$#67";
String s2 = "sssdCCsdfGSDAX@$#67";
StringBuffer buffer = new StringBuffer();
buffer.append(s1).append(s2);
s1 = buffer.toString().substring(s1.length());
s2 = buffer.toString().substring(0,s1.length());