Switch statement trouble in an Applet

Question

Hello everyone. I am attempting to get a Button to work in an applet.
This applet tells and stores jokes. There are two String arrays being used to store the jokes. There are also two buttons being used. (One to tell the jokes - the second to tell the punch line). Coding for this applet is NOT finished, so not all of the components work. However, I am focusing on the "punch line Button".
(Ideally, the punch line should only be reveiled if the joke has already been shown. All jokes and punch lines are stored in two String arrays. I've tried to establish indexes for the joke array and the punch line array so that the user will always get the matching punchline to the joke).
The problem:
The punchline Button will display the first punchline - over and over. I don't understand why. The code is plentiful, here is the snippet of the code for the joke button with the error:
public class Joker3 extends Applet implements ActionListener{
... // the tellJoke Button is not show here because it works okay.
TextArea result;
Button telljoke;
int indexj=0, indexp=0;
String pls[] = new String[10];
public void init(){
result = new TextArea();
punLine = new Button("Punch line");
          punLine.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                    punLine_actionPerformed(e);
   dbase();
public void punLine_actionPerformed(ActionEvent e){
          if(indexp <= pls.length) //Test for end of array
              indexp=0;  //Restart if end is reached
          String str = pls[indexp];
          int i=0;
          if(str == null)
               i=1;
          switch(i){  //checking for null element in array
               case 1: break;
               case 0:{ if(indexp < indexj){  //Only tell joke is told
                             result.append("\n" + pls[indexp]); //only if  indexp == 0 and indexj == 1
                             indexp++; // now both indexp and indexj should be 1
                             str = pls[indexp];  // String variable is updated
                             break;
               break;  //extra break statement to force return of control
public void dbase(){
          jks = new String[20];
          pls = new String[20];
          jks[0]= "Why did the chicken cross the road?";
          jks[1]= "What's the worst thing about working for McDonalds?";
          pls[0]= "To get to the other side.";
          pls[1]= "The pay";
}//end of Applet Thank you in advance for your help.

Answer 1

ha, ha, ha.. well I only put these corny jokes in there to develop the functionality of the Applet. They'll be supplemented with better ones later.
Meanwhile, I just figured out my own error. My problem was within the first if statement:
if(indexp <= pls.length)  // This should have been >=
      indexp = 0;             //  It was resetting idexp to zero each timeThanks to anyone who attempted to answer.