JAVA
java
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import java.lang.StringBuffer;
import java.lang.StringBuilder;
public class TestSpeedOfConcatStrings{
public static void main(String[] args) {
int n=1000;
System.out.println("Speed of concatenation of "+n+" empty strings.");
testStringPlus(n);
testStringConcat(n);
testStringBuffer(n);
testStringBuilder(n);
}
public static void testStringPlus(int n) {
long startTime = System.nanoTime();
String str="";
for(int i=0;i<n;i++) str+=str;
long endTime= System.nanoTime();
System.out.println("1. Using operator + . Time: "+(endTime -startTime)/1000000.00+" miliseconds");
}
public static void testStringConcat(int n) {
long startTime = System.nanoTime();
String str="";
for(int i=0;i<n;i++) str+=str.concat(str);
long endTime= System.nanoTime();
System.out.println("2. Using concat() method. Time: "+(endTime -startTime)/1000000.00+" miliseconds");
}
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