/**以下实例演示了通过 "+" 操作符和StringBuffer.append() 方法来连接字符串，并比较其性能*/

public class StringConcatenate {

public static void main(String[] args){

long startTime = System.currentTimeMillis();

for(int i=0;i<5000;i++){

String result = "This is"

+ "testing the"

+ "difference"+ "between"

+ "String"+ "and"+ "StringBuffer";

}

long endTime = System.currentTimeMillis();

System.out.println("字符串连接"

+ " - 使用 + 操作符 : "

+ (endTime - startTime)+ " ms");

long startTime1 = System.currentTimeMillis();

for(int i=0;i<5000;i++){

StringBuffer result = new StringBuffer();

result.append("This is");

result.append("testing the");

result.append("difference");

result.append("between");

result.append("String");

result.append("and");

result.append("StringBuffer");

}

long endTime1 = System.currentTimeMillis();

System.out.println("字符串连接"

+ " - 使用 StringBuffer : "

+ (endTime1 - startTime1)+ " ms");

}

}