Octal-to-binary-conversion-using-Java

Octal to Binary Conversion using Java Here, on this page, we will discuss octal to binary conversion using java. For this purpose, we need to ask for an octal number from user and convert that octal number to its binary equivalent form and then print the converted number onto the screen.

For conversion, we first convert the octal number into decimal form and then convert the decimal number to a binary number.

Octal to binary conversion using java Method 1:- Accept octal number Convert it into decimal Equivalent Convert this decimal value into Binary Make sure you have visited these two pages before moving ahead with the code –

Octal to Decimal conversion Decimal to Binary Conversion Method 1 Code in Java Run //Java program to convert octal number to binary number class Main { public static void main(String args[]) { int octal = 12;

    //Declaring variable to store decimal number
    int decimal = 0;
    //Declaring variable to use in power
    int n = 0;

    //writing logic for the octal to decimal conversion
    while(octal > 0)
    {
        int temp = octal % 10;
        decimal += temp * Math.pow(8, n);
        octal = octal/10;
        n++;
    }

    int binary[] = new int[20];
    int i = 0;

    //writing logic for the decimal to binary conversion
    while(decimal > 0)
    {
        int r = decimal % 2;
        binary[i++] = r;
        decimal = decimal/2;
    }

    //printing result
    System.out.print("Binary number : ");

    for(int j = i-1 ; j >= 0 ; j--)
        System.out.print(binary[j]+"");

}

} Output Enter a octal number : 12 Binary number : 1010 Related Pages Decimal to Binary conversion

Decimal to Octal Conversion

Decimal to Hexadecimal Conversion

Permutations in which n people can occupy r seats in a classroom

Octal to Binary conversion

Quadrants in which a given coordinate lies

Method 2 Each digit of an octal number can be converted into its binary Equivalent (see image)

Binary Representation for Octal digit: 0 => 000 1 => 001 2 => 010 3 => 011 4 => 100 5 => 101 6 => 110 7 => 111 Octal to binary conversion using java Octal to Binary in Java Method 2 Code in Java: Run import java.util.HashMap; class Main { public static void main(String[] args) { HashMap b =new HashMap(); b.put(0,"000"); b.put(1,"001"); b.put(2,"010"); b.put(3,"011"); b.put(4,"100"); b.put(5,"101"); b.put(6,"110"); b.put(7,"111");

    String result =" ";
    long num = 347;
    long n=num;
    while(n !=0)
    {
        int rem=0;
        rem=(int)n%10;
        if(n!=0)
        {
            result = b.get(rem)+result;

        }
        n=n/10;

    }
    System.out.println(result);
}

} Output Enter a octal number : 347 Binary number : 011100111