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Thread: I Seriously Need your Serious Help.

  1. #1
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    Unhappy What to do with returning null ?



    Newbie Question Coming thru. And to sir JPS I am greatfully thank you and sorry. I've fixed it now.
    TO the point. This Code now gives me nullpointerExceptions. I tried putting String to it so It won't return as null but it still won't budge.


    import java.util.Scanner;
    public class RegistrationofEmployees {
     public static final	String emp[][] = new String[4][4];
        public static void main(String[] args) {
     
           	Scanner input = new Scanner(System.in);
     
        	System.out.println("Registration of Employee");
     
        	startPage();
        	System.out.println("\nProgram Terminated...");
     
        }
     
     
     	public static void startPage(){
     
    	String employee ="";
     
    			Scanner input = new Scanner(System.in);
    			System.out.println("Registration of Employee");
    			System.out.println("============================================");
    			System.out.println("Enter your Choice: ");
    			System.out.println("============================================");
    			System.out.println("\t\t[a] Register Employee");
    			System.out.println("\t\t[b] Time Keeping");
    			System.out.println(" ");
    			System.out.print("Choose Letter: ");
    			String choice1 = input.next();
    			if(choice1.length() == 1){
    				char choice2 = choice1.charAt(0);
    			if (choice2 == 'a' || choice2 == 'A'){
    				System.out.println("Lalalalala");
     
    			}else if(choice2 == 'b' || choice2 == 'B'){
    				searchEmployee(employee);
     
     
     
    			}else{
    				System.out.println("============================================");
    				System.out.println("Invalid Letter");
    				System.out.println("============================================");
    			}
    			}else{
    				System.out.println("Invalid String..!");
    			}
     
    	public static String[] searchEmployee(String empNumber){
    		Scanner input= new Scanner(System.in);
    		System.out.println("Enter Employee Number: ");
    		String empNumber1 = input.next();
    		String[] employee = new String[4];
    		if(empNumber1.length() < 5 || empNumber1.length() > 5){
    			System.out.println("Criteria is invalid.");
    			return null;
     
    		}else{
    			for(int x=0;x<emp.length;x++){
    				if(!emp[x][0].equals("")){
    					if(emp[x][0].equals(empNumber1)){
    						employee[0] = emp[x][0];
    						employee[1] = emp[x][1];
    						employee[2] = emp[x][2];
    						employee[3] = emp[x][3];
    						return employee;
    						}
    					}
    			}
    		}	System.out.println("Employee number provided not found!");
    			return null;
     
     
     
     
     
    	}
    	public static void data(String emp[][]){
     
    		emp[0][0] = "10000";
    		emp[0][1] = "John Loudwig";
    		emp[0][2] = "Alonsagay";
    		emp[0][3] = "Regular Employee";
     
    		emp[1][0] = "10001";
    		emp[1][1] = "Gienna";
    		emp[1][2] = "Belonio";
    		emp[1][3] = "Manager";
     
    		emp[2][0] = "10002";
    		emp[2][1] = "James";
    		emp[2][2] = "Arcilla";
    		emp[2][3] = "Supervisor";
    }
    The code is giving me three NullPointerExceptions at these lines :startPage();
      public static void main(String[] args) {
     
           	Scanner input = new Scanner(System.in);
     
        	System.out.println("Registration of Employee");
     
        	startPage();
        	System.out.println("\nProgram Terminated...");
     
        }
    At the searchemployee(employee);
    if(choice1.length() == 1){
    				char choice2 = choice1.charAt(0);
    			if (choice2 == 'a' || choice2 == 'A'){
    				System.out.println("Lalalalala");
     
    			}else if(choice2 == 'b' || choice2 == 'B'){
    				searchEmployee(employee);
    annnd at this loop under the searchEmployee method
    	if(!emp[x][0].equals("")){
    It gives me a nullPointerException at those three lines. I tried making a boolean argument on the startpage(); so that when it returns a null, the system will do something.. but it didnt work. I tried try and catch but I have really no idea what to do with it.

    Please help me.
    Last edited by MsBottledDream; October 12th, 2012 at 09:35 PM. Reason: I've fixed some stuff.

  2. #2
    Super Moderator jps's Avatar
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    Default Re: I Seriously Need your Serious Help.

    Hi MsBottledDream and welcome to the forum.
    Please see the announcements page for the use of code tags and other facts about the forum.

    giving me JUST one error saying it's incompatible
    It is easier to offer assistance if you provide the copy-paste version of the error message.

    Edit the post above, fix the code and include the error message. Then it will be much easier to offer advice.


    Edit
    Oh, and.. What does that title have to do with the question or the code, seriously. See if you can find a better title for the post.