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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	static int indexOfIgnoreCase(String str, String find, int start) {
  11. 		for(int i = start; i < str.length(); i++) {
  12. 			if(str.substring(i, i + find.length()).equalsIgnoreCase(find)) {
  13. 				return i;
  14. 			}
  15. 		}
  16. 		return -1;
  17. 	}
  18.  
  19. 	static void solve(String sentence) {
  20. 		String find = "java";
  21. 	    String replace = "JAVA";
  22. 	    int index = 0;
  23. 	    while(index < sentence.length()) {
  24. 	    	index = indexOfIgnoreCase(sentence, find, index);
  25. 	    	if(index == -1) {
  26. 	    		break;
  27. 	    	}
  28. 	        sentence = sentence.substring(0, index) +    			// string up to found word
  29. 	                   replace +                       				// replace found word
  30. 	                   sentence.substring(index + find.length());   // remaining part of the string
  31. 	        index += find.length();
  32. 	    }
  33. 	    System.out.println(sentence);
  34. 	}
  35.  
  36. 	public static void main (String[] args) throws java.lang.Exception
  37. 	{
  38. 		String sentence = "Java, JAva, java, JaVa, JAVa";
  39. 		solve(sentence);
  40. 	}
  41. }
Success #stdin #stdout 0.07s 380160KB
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JAVA, JAVA, JAVA, JAVA, JAVA
https://ideone.com/5JHGsw
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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