比较二维数组

Question

How to compare two dimensional array with different size (different row and column)?

I have two different matrix like this : kuliahprior[][] and hasil1[][] .

I want to see if there is element of kuliahprior in hasil1 , they have different size. I make the check process in cekKondisi() method. And then call it in cekpriorfinal() method, by sent element of hasil1[i][j] . This is my code.

But they still hang.. not error just hang for unknown (sorry for my english, thankyou)

    public String cekKondisi(int kdbuka){
        String status = " ";
        String kd_dosen; String kdbukax[] = new String[MAX]; 
        for (int i=0; i<dosenprior.length;i++){    
             kd_dosen=dosenprior[i];
             kdbukax=peta.getKodeBuka1(kd_dosen,tahunakademik);
             for (int k=0;k<kdbukax.length;k++){
                if (kdbuka==Integer.parseInt(kuliahprior[i][k]))
                   status = slotprior[i];      
            }
        }    
        return status;
    }


    public void cekpriorfinal(){
        String status [][]=new String[15][15];
        for (int i=0;i<15;i++){
            for(int j=0;j<15;j++){
               status [i][j] = cekKondisi(hasil1[i][j]);     
            }
        }   
        for (int i=0;i<15;i++){
            for (int j=0;j<15;j++){
                if (status[i][j]==" ")
                    status[i][j]="ok";
            }
        }
        for (int i=0;i<15;i++){
             for (int j=0;j<15;j++){
                System.out.print (status[i][j]+" "); 
             }
             System.out.println();    
         }
   }

Answer 1

I can't spot anything that causes an infinite loop, so I would suggest to check if this line doesn't cause the hang:

kdbukax = peta.getKodeBuka1(kd_dosen,tahunakademik);

Make sure you are not impatient and it was still working on the result.

You might try to use a debugger and pause the application at a random point where you think it "hangs". You will see at which line it currently was. Try to solve the problem somewhere there or in that context.

Also, change this

String kdbukax[] = new String[MAX]; 

to this:

String kdbukax[] = null;

There is no need to create an array, since you reassign the variable here:

kdbukax=peta.getKodeBuka1(kd_dosen,tahunakademik);

And if MAX is really big, that might take some time to allocate an array of that size. Creating an array on the heap has this complexity: O(n) .