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Christina
Index.java
1 Answer(s)      7 years ago
Posted in : Java Beginners
I need to write a Java GUI application called Index.java that inputs several lines of text and a search character and uses String method indexOf to determine the number of occurrences of the character in the text.

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April 6, 2010 at 12:43 PM


Hi Friend,

Try the following code:

import java.util.*;

public class CountCharacters {
public static void main(String[] args) {
System.out.println("Enter string");
Scanner input=new Scanner(System.in);
String str=input.nextLine();
String newString=str.replace(" ","");
String s = str.replaceAll((String.format("(.)(?<=(?:(?=\\1).).{0,%d}(?:(?=\\1).))", str.length())), "");
String st=s.replace(" ","");
char character[]=st.toCharArray();
System.out.println("Search Character: ");
String chh=input.next();
char ch=chh.charAt(0);
System.out.println(ch+ " occurs " + count(ch,newString)+" times.");
}
static int count(char c, String str) {
if (str == null) return 0;
int cnt = 0;
for (int i = 0;; cnt++) {
if ((i = str.indexOf(c,i)+1) == 0) break;
}
return cnt;
}
}

Thanks









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