How to align String on console output

Question

I've to write code for:

I'd written the code:

public class tables {
    public static void main(String[] args) {
        //int[][] table = new int[12][12];
        String table="";
        for(int i=1; i<13; i++){
            for(int j=1; j<13; j++){
                //table[i-1][j-1] = i*j;
                table+=(i*j)+" ";
            }
            System.out.println(table.trim());
            table="";
        }
    }
}

But the problem is with the output format. I need the output in a matrix like fashion, each number formatted to a width of 4 (the numbers are right-aligned and strip out leading/trailing spaces on each line). I'd tried google but not find any good solution to my problem. Can anybody help me out?

Answer 1

You can use format() to format your output according to your need..

    for(int i=1; i<13; i++){
        for(int j=1; j<13; j++){

           System.out.format("%5d", i * j);
        }
        System.out.println();  // To move to the next line.
    }

Or, you can also use: -

System.out.print(String.format("%5d", i * j));

in place of System.out.format..

Here's is the explanation of how %5d works: -

• First, since we are printing integer, we should use %d which is format specifier for integers..
• 5 in %5d means the total width your output will take.. So, if your value is 5, it will be printed to cover 5 spaces like this: - ****5
• %5d is used to align right.. For aligning left, you can use %-5d. For a value 5, this will print your output as: - 5****

Answer 2

In my example the array contains character string's with different length and due to that I was unable to arrange string and other strings of different arrays were mis-match on console. with a different concept I could arrange those arrays on console my codes are as below.

package arrayformat;

 /**
 *
 * @author Sunil
 */
 public class ArrayFormat {



  /**
  * @param args the command line arguments
  */

  public static void main(String[] args) {

  int[] productId = new int[]  
 {1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,};
   String[] productName= new String[]{"Pepsi","kissan jam","Herbal 
 oil","Garnier man's","Lays chips","biscuits","Bournvita","Cadbury","Parker 
 Vector","Nescafe",};
   String[] productType = new String[]{"Cold Drink","Jam","Oil","Face 
 wash","chips","Biscuits","Health 
 Supplement","Chocolate","Stationary","Coffee",};
    float[] productPrice = new float[]{24,65,30,79,10,20,140,20,150,80,}; 


       int productNameMaxlength=0;
   int productTypeMaxlength=0;



    for (String productName1 : productName) {
        if (productNameMaxlength < productName1.length()) {
            productNameMaxlength = productName1.length();
        }
    }


    for (String productType1 : productType) {
        if (productTypeMaxlength < productType1.length()) {
            productTypeMaxlength = productType1.length();
        }
    }



   for(int i=0;i<productType.length;i++)

   { 
              System.out.print(i);

      System.out.print("\t");

              System.out.print(productId[i]);

              System.out.print("\t");

              System.out.print(productName[i]);

       for(int j=0;j<=productNameMaxlength-productName[i].length
     ();j++)

       {

        System.out.print(" ");

       }

       System.out.print("\t");

       System.out.print(productType[i]);

       for(int j=0;j<=productTypeMaxlength-productType[i].length
    ();j++)

       {
           System.out.print(" ");
       }

               System.out.print("\t");

       System.out.println(productPrice[i]);
          }           
      }

    }
   and output is--
  Sr.No  ID     NAME            TYPE               PRICE
   0    1001    Cadbury         Chocolate           20.0
   1    1002    Parker Vector   Stationary          150.0
   2    1003    Nescafe         Coffee              80.0
   3    1004    kissan jam      Jam                 65.0
   4    1005    Herbal oil      Oil                 30.0
   5    1006    Garnier man's   Face wash           79.0
   6    1007    Lays chips      chips               10.0
   7    1008    biscuits        Biscuits            20.0
   8    1009    Bournvita       Health Supplement   140.0
   9    1010    Pepsi           Cold Drink          24.0

Since I am unable to answer my question where I have ask my question because of block to ask question and answer I am quoting my answer and this was a different kind of array format I feel.