How to reverse a string in java?

0 votes

I have "I am a student" kept in a String variable named Hello.

I need to print it in a reversed manner.

How to do that?

Apr 18, 2018 in Java by Akrati
• 3,150 points
51 views

3 answers to this question.

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0 votes

You can use this:

new StringBuilder(Hello).reverse().toString()
answered Apr 18, 2018 by Daisy
• 8,020 points
0 votes

Instead of using StringBuffer and StringBuilder, you can use char[].

public static String reverse(String input){
    char[] in = input.toCharArray();
    int begin=0;
    int end=in.length-1;
    char temp;
    while(end>begin){
        temp = in[begin];
        in[begin]=in[end];
        in[end] = temp;
        end--;
        begin++;
    }
    return new String(in);
}
answered Jul 31, 2018 by sharth
• 3,310 points
0 votes
public static String reverse(String s) {
    if (s == null) {
        return "";
    }
    if (s.isEmpty()) {
        return "";
    }
    return reverse(s.substring(1)) + s.charAt(0);
}
answered Aug 16, 2018 by samarth295
• 2,190 points

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