package strings;
public class StringAdd {
public static void main(String[] args) {
String s1 = "";
long startTime1 = System.currentTimeMillis();
for(int i =0 ; i<100000;i++){
s1 += "ssdf";
}
long endTime1 = System.currentTimeMillis();
System.out.println("String拼接100000遍耗时：" + (endTime1 - startTime1) + "ms");
StringBuffer s2 = new StringBuffer();
for(int i =0 ; i<100000;i++){
s2.append("ssdf");
}
long endTime2 = System.currentTimeMillis();
System.out.println("StringBuffer拼接100000遍耗时：" + (endTime2 - endTime1) + "ms");
StringBuilder s3 = new StringBuilder();
for(int i =0 ; i<100000;i++){
s3.append("ssdf");
}
long endTime3 = System.currentTimeMillis();
System.out.println("StringBuilder拼接100000遍耗时：" + (endTime3 - endTime2) + "ms");
}
}
package strings;
public class StringAdd {
public
阅读背景：
String、StringBuffer、StringBuilder的效率对比
来源：互联网
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