toBinaryString() Method in java, Without using predefined method

Java Programming Language Number Class in java (Article) Number Class in java (Program)

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Program:

 class DecimalBinaryExample{

  public void convertBinary(int num){
     int binary[] = new int[40];
     int index = 0;
     while(num > 0){
       binary[index++] = num%2;
       num = num/2;
     }
     for(int i = index-1;i >= 0;i--){
       System.out.print(binary[i]);
     }
  }

  public static void main(String a[]){
     DecimalBinaryExample obj = new DecimalBinaryExample();
     System.out.println("Binary representation of 125: ");
     obj.convertBinary(125);
     System.out.println("\nBinary representation of 55: ");
     obj.convertBinary(55);
     System.out.println("\nBinary representation of 999: ");
     obj.convertBinary(999);
  }
}

Output:

Binary representation of 125:
1111101
Binary representation of 55:
110111
Binary representation of 999:
1111100111Press any key to continue . . .

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