String method indexOf

Question

I have to show the number of occurances of a character in a string.
I chose the letter 'a' - here is my code, my problem is i only get one occurance, how do i show all indexes of 'a'?
thanks,
barb
// Java extension packages
import javax.swing.*;
public class IndexOf {
public static void main( String args[] )
String text ="This class is really hard \n" +
     "I'm glad I did well on the midterm \n" +
     "It took a long time.";
     String output1 =      "'This class is really hard.\n" +
               "I'm glad I did well on the midterm.\n" +
               "It took a long time.'"+ "\n\n";
     int pos;
int count = 0;
pos = text.indexOf ('a');
while ( pos != -1)
          count++;
          pos = text.indexOf ('a', pos+1);
// test indexOf to locate a character in a string
String output2 = "'a' is located at index " + text.indexOf ('a') +
text.indexOf('a');
JOptionPane.showMessageDialog( null, output1 + output2,
          "String method indexOf",
JOptionPane.INFORMATION_MESSAGE );
System.exit( 0 );
} // end class String IndexOf

Answer 1

// Try this.
String text ="This class is really hard \n" +
"I'm glad I did well on the midterm \n" +
"It took a long time.";
String result="";
for (int i=0; i<text.length(); i++)
{ if  (text.charAt(i)=='a')result += "Index: " + i + System.getProperty( "line.separator" ); }
System.out.print(result);