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Java String Exercises: Create a new string from a given string swapping the last two characters of the given string

Java String: Exercise-57 with Solution

Write a Java program to create a new string from a given string swapping the last two characters of the given string. The length of the given string must be two or more.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public String lastTwo(String str)
{
if (str.length() < 2) return str;
return str.substring(0, str.length()-2)+ str.charAt(str.length()-1) + str.charAt(str.length()-2);
}
    public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "string";
      System.out.println("The given strings is: "+str1);
      System.out.println("The string after swap last two characters are: "+m.lastTwo(str1));
    }
}	

Sample Output:

The given strings is: string
The string after swap last two characters are: strign

Pictorial Presentation:

Java String Exercises: Create a new string from a given string swapping the last two characters of the given string.

Flowchart:

Flowchart: Java String Exercises - Create a new string from a given string swapping the last two characters of the given string.

Visualize Java code execution (Python Tutor):


Java Code Editor:

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Previous: Write a Java program to append two given strings such that, if the concatenation creates a double characters then omit one of the characters.
Next: Write a Java program to read a string and return true if it ends with a specified string of length 2.

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Java: Tips of the Day

Count the number of occurrences of a char in a String:

int count = StringUtils.countMatches("a.b.c.d", ".");

Ref: https://bit.ly/2OTy6sG