array input block

[waklo99]

can someone help me with my code....:confused:

I need to block if the input has the same value ... example: if i input 1 in array[1] and then input another 1 in array[2] it will block...

plz help :(

here's the code:

import java.util.Arrays;
import java.io.*;


public class Main {
	
    BufferedReader ui = new BufferedReader(new InputStreamReader(System.in));
    public String yn;
    	       
    public void sortIntArray()throws IOException {
        int num = 1;
        int arrayToSort[] = new int[10]; 
        int array;
       
        for(int i=0;i<arrayToSort.length;i++){
        	do{ 
     			try{
     				do{
        			System.out.print("NAME"+" "+ num+" :");
					array=Integer.parseInt(ui.readLine());  // here i need to block the same number.... Dx
					arrayToSort[i]=array;
		
					else System.out.println("error! yo already typed this number");
					}while(true);
					num++;
					if(array>=0)break;
					else
					System.out.println("error");
					
					if(arrayToSort[i]==arrayToSort[i])System.out.println("error");		  
        		}catch(NumberFormatException nfe){System.out.println("error!");}
        	}while(true);
        }
        
        
        Arrays.sort(arrayToSort);
        
        for (int i = 0; i < arrayToSort.length; i++)
            System.out.println(arrayToSort[i]);
    }

   
    
    public static void main(String[] args)throws IOException {
    	
        Main main = new Main();
        main.sortIntArray();
        main.exit();
       
    }
    public void exit()throws IOException{
		
   		System.out.println("Do you want to exit? type: yes or no");
		yn=ui.readLine();
				
		if (yn.equalsIgnoreCase("yes"))
		System.exit(0);
								
		if (yn.equalsIgnoreCase("no"))
		{
		sortIntArray();				
		}
		if (yn!="yes")
		{
		System.out.println("error");exit();	
		}
		}
}

[JosAH]

Use a Set<Integer>. Each time you have read a number check if it's in the set. If it is the user had typed a duplicate number. If it isn't accept the number and add it to your set.

kind regards,

Jos

[waklo99]

TT^TT I don't get it.... but thnx for d reply....

[Norm]

I need to block if the input

Can you explain what you mean by "block"?
One usage is that the code stops executing until an event happens.
For example a read operation will block waiting for the user to enter some thing.

[waklo99]

by "block or trap" I mean if you enter the same integer like 3 and next 3 again it will go System.out.println("sorry you've inputed this number earlier, plz input another number");
..... x(

[JosAH]

by "block or trap" I mean if you enter the same integer like 3 and next 3 again it will go System.out.println("sorry you've inputed this number earlier, plz input another number");
..... x(

Are you going to ignore my hint about using a Set<Integer> class just because you "don't get it"?

kind regards,

Jos

[waklo99]

@ Josah: Ive searched it in the internet on how to use Set<Integer> but don't seem to find any tutorial or explanation of how to use it TT^TT

[JosAH]

@ Josah: Ive searched it in the internet on how to use Set<Integer> but don't seem to find any tutorial or explanation of how to use it TT^TT

Never try to program anything without having this available; at least bookmark it or even better: download the entire thing so you can have it available everywhere.

kind regards,

Jos

[al_Marshy_1981]

Like Jos has being saying a Set will not accept duplicates, if you study the Set class and its methods you will solve the problem

Set (Java Platform SE 6)

[waklo99]

thnx guys............. I found this while searching... is it like this?

     
import java.util.HashSet;
import java.util.Set;

public class FindDups {
  public static void main(String args[]) {
    Set s = new HashSet();
    String[] values = new String[] { "java", "java2", "java2s", "javas",
        "java" };
    for (int i = 0; i < values.length; i++)
      if (!s.add(values[i]))
        System.out.println("Duplicate detected: " + values[i]);

    System.out.println(s.size() + " distinct words detected: " + s);
  }
}

[al_Marshy_1981]

well has that code worked?

[waklo99]

yes the codes worked thnx for the replies guys