Java Program to Convert Decimal to Fraction

GTU JAVA Practical 16

Write a program that prompts the user to enter a decimal number and displays the number in a fraction. Hint: Read the decimal number as a string, extract the integer part and fractional part from the string.

				
					import java.util.Scanner;

class Fraction {
  private int real;
  private int imaginary;

  Fraction(int r, int img) {
    real = r;
    imaginary = img;
  }
  public long gcm(long a, long b) {
    return b == 0 ? a : gcm(b, a % b);
  }
  public String toString() {
    long gcm = gcm(real, imaginary);
    return real / gcm + "/" + imaginary / gcm;
  }
}
public class Practical_16 {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.print("Enter a Decimal Number: ");
    String decimal = sc.nextLine();
    int indexOfDecimal = decimal.indexOf(".");
    int len = decimal.substring(indexOfDecimal).length();
    int imag_part = (int) Math.pow(10, len - 1);
    int real_part = (int)(Double.parseDouble(decimal) * imag_part);
    Fraction fr = new Fraction(real_part, imag_part);
    System.out.println("The Fraction Number is " + fr);
    System.out.print("Enter a Decimal Number: ");
    decimal = sc.nextLine();
    indexOfDecimal = decimal.indexOf(".");
    len = decimal.substring(indexOfDecimal).length();
    imag_part = (int) Math.pow(10, len - 1);
    real_part = (int)(Double.parseDouble(decimal) * imag_part);
    fr = new Fraction(real_part, imag_part);
    System.out.println("The Fraction Number is " + fr);
  }
}

Output