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Core Java. Swaping first and last words in sentence. Bug
Posted on 2016-07-27
I would like to make a piece of code that swap first and last words in sentence. I come up with some solution as you can see below. However, the program doesn't work well. Please help me to find mistake. You code will be much appreciated !
NOW:
input : "London is the capital of UK"
Output : "UK is the capital of UK London "
Should be :
input : "London is the capital of UK"
Output : "UK is the capital of London "
Looking forwards for help from you dear Experts !
NOW:
input : "London is the capital of UK"
Output : "UK is the capital of UK London "
Should be :
input : "London is the capital of UK"
Output : "UK is the capital of London "
Looking forwards for help from you dear Experts !
package TaskCh;
//import java.util.Scanner;
public class TaskCh {
public static void main(String[] args) {
// System.out.println("Enter line of text.");
// Scanner kb = new Scanner(System.in);
String s = "London is the capital of UK" ; // kb.nextLine(); // Read the whole line instead of word by word
System.out.println("Original line is : ");
System.out.println(s);
String[] words = s.split("\\s+"); // Split on any whitespace
if (words.length > 1) {
// Swap first and last words
s = words[words.length-1] + " " + s.substring(s.indexOf(words[1], words[0].length() -2 )) + " " + words[0].toLowerCase();
s = s.substring(0, 1).toUpperCase() + s.substring(1); //
}
System.out.println("\n\n\nModified line is :");
System.out.println(s);
}
}
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7 Comments
Active today
Because I got my hands slapped for providing full code to your previous question, I'm taking a little different approach to this one.
Define a new string as the first word as the substring of the string up to the space. Define a new string as the last word as the substring starting with the last space (plus one more character). Define a new string as the middle replacing the first word and the last word. The output string should then simply be last word + middle + first word. Take a try at doing that.
Define a new string as the first word as the substring of the string up to the space. Define a new string as the last word as the substring starting with the last space (plus one more character). Define a new string as the middle replacing the first word and the last word. The output string should then simply be last word + middle + first word. Take a try at doing that.
@Sunny
here you go
here you go
package TaskCh;
//import java.util.Scanner;
import java.util.Arrays;
public class TaskCh {
public static void main(String[] args) {
// System.out.println("Enter line of text.");
// Scanner kb = new Scanner(System.in);
String s = "London is the capital of UK" ; // kb.nextLine(); // Read the whole line instead of word by word
System.out.println("Original line is : ");
System.out.println(s);
String[] words = s.split("\\s+"); // Split on any whitespace
if (words.length > 1) {
String lastword = words[words.length-1];
String firstword = words[0];
words[0] = lastword;
words[words.length-1] = firstword;
s = Arrays.toString(words).replaceAll("[\\[\\]\\,]", "");
}
System.out.println("\n\n\nModified line is :");
System.out.println(s);
}
}
Active today
While I would have preferred you attempted to write the code using my directions, since full code is being supplied, this is how I would have gone about it (very simple) -
String str = "London is the capital of UK";
String first = str.substring(0,indexOf(" "));
String last = str.substring(lastIndexOf(
String middle = str.replace(first,"").repl
String output = last + middle + first;
String str = "London is the capital of UK";
String first = str.substring(0,indexOf(" "));
String last = str.substring(lastIndexOf(
String middle = str.replace(first,"").repl
String output = last + middle + first;
awking00, I'm sorry. I just saw your last post :( I'm actually submitting the close of question, webpage updated that your valuable comment come up :( once again sorry
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