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Write a Java Program to Convert Binary Number to Decimal and vice-versa
PROGRAM: Java Program to Convert Binary Number to Decimal and vice-versa
/*Java Program to Convert Binary Number to Decimal and vice-versa*/
1: Binary to Decimal Conversion Using Custom Method
class Main {
public static void main(String[] args) {
// binary number
long num = 110110111;
// call method by passing the binary number
int decimal = convertBinaryToDecimal(num);
System.out.println(“Binary to Decimal”);
System.out.println(num + ” = ” + decimal);
}
public static int convertBinaryToDecimal(long num) {
int decimalNumber = 0, i = 0;
long remainder;
while (num != 0) {
remainder = num % 10;
num /= 10;
decimalNumber += remainder * Math.pow(2, i);
++i;
}
return decimalNumber;
}
}
2: Binary to Decimal Conversion Using parseInt()
class Main {
public static void main(String[] args) {
// binary number
String binary = “01011011”;
// convert to decimal
int decimal = Integer.parseInt(binary, 2);
System.out.println(binary + ” in binary = ” + decimal + ” in decimal.”);
}
}
3: Decimal to Binary Conversion using Custom Method
class Main {
public static void main(String[] args) {
// decimal number
int num = 19;
System.out.println(“Decimal to Binary”);
// call method to convert to binary
long binary = convertDecimalToBinary(num);
System.out.println(“\n” + num + ” = ” + binary);
}
public static long convertDecimalToBinary(int n) {
long binaryNumber = 0;
int remainder, i = 1, step = 1;
while (n!=0) {
remainder = n % 2;
System.out.println(“Step ” + step++ + “: ” + n + “/2”);
System.out.println(“Quotient = ” + n/2 + “, Remainder = ” + remainder);
n /= 2;
binaryNumber += remainder * i;
i *= 10;
}
return binaryNumber;
}
}
4: Decimal to Binary Conversion using toBinaryString()
class Main {
public static void main(String[] args) {
// decimal number
int decimal = 91;
// convert decimal to binary
String binary = Integer.toBinaryString(decimal);
System.out.println(decimal + ” in decimal = ” + binary + ” in binary.”);
}
}
