📄 appendstringtest.java
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public class AppendStringTest {
public static void main(String[] args) {
String text="";
long beginTime = System.currentTimeMillis();
for(int i=0;i<10000; i++)
text =text +1;
long endTime = System.currentTimeMillis();
System.out.println("zhixingshijian:" + (endTime-beginTime));
StringBuilder builder = new StringBuilder("");
beginTime=System.currentTimeMillis();
for(int i=0;i<10000; i++)
builder.append(String.valueOf(i));
endTime = System.currentTimeMillis();
System.out.println("zhixingshijian:" + (endTime-beginTime));
}
}
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