Java Null Pointer Pointer Exception sometimes occurs

[kmaclean]

After switching back and forth between languages, get Java Null Pointer Pointer Exception. This one occurred when going from English to Dutch version of Speech Submission App.

java.lang.NullPointerException
	at java.util.StringTokenizer.<init>(Unknown Source)
	at java.util.StringTokenizer.<init>(Unknown Source)
	at speechrecorder.Prompts.getPromptLine(Prompts.java:105)
	at speechrecorder.Prompts.<init>(Prompts.java:88)
	at speechrecorder.CapturePlayback.<init>(CapturePlayback.java:346)
	at speechrecorder.RecorderApplet.init(RecorderApplet.java:43)
	at sun.applet.AppletPanel.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

[kmaclean]

Number of prompts must match the actual number of prompts in the text file:

public Prompts(int NumberofPrompts, String Language) {
	if (Language.equals("EN")) {
		promptList = getPromptTextFile("englishPromptList.txt", 1223); // number of prompts needs to be exact or there might be an error on a roll-over
	} else if (Language.equals("NL")) {
		promptList = getPromptTextFile("nl","dutchPromptList.txt", 813);
	} else if (Language.equals("DE")) {
		promptList = getPromptTextFile("germanPromptList.txt", 347);
	} else if (Language.equals("RU")) {
		promptList = getPromptTextFile("russianPromptList.txt", 81);	
	} else if (Language.equals("IT")) {
		promptList = getPromptTextFile("it","italianPromptList.txt", 1185);	
	} else if (Language.equals("HB")) {
		promptList = getPromptTextFile("hebrewPromptList.txt", 55);	
	} else {
        System.err.println("getPromptTextFile error accessing prompt file for "+ Language + "using default English prompts");
		promptList = englishPromptList;
	}