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ReverseString.java
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30 lines (24 loc) · 762 Bytes
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//Reverse a String (using StringBuilder class)
package StringBuilders;
import java.util.*;
public class ReverseString {
public static void main(String[] args) {
StringBuilder sb = new StringBuilder("hello");
System.out.println("The original string is :" + sb);
for(int i=0; i<sb.length()/2; i++){
int front = i;
int back = sb.length()-1-i; // 5-1-0 = 4
char frontChar = sb.charAt(front);
char backChar = sb.charAt(back);
sb.setCharAt(front, backChar);
sb.setCharAt(back, frontChar);
}
System.out.print("Reverse string is : ");
System.out.print(sb);
}
}
//output
/*
The original string is :hello
Reverse string is : olleh
*/