Java Radian Calculation radiansToRA(final double raRadians)

Description

Obtain the String RA of the given Radians.

License

Open Source License

Parameter

Parameter	Description
raRadians	a parameter

Return

String HH mm ss.s

Declaration

public static String radiansToRA(final double raRadians) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.NumberFormat;

public class Main {
    private static NumberFormat raFormat = NumberFormat.getInstance();

    /**//from   w ww.  j  a  va  2  s . c  o m
     * Obtain the String RA of the given Radians.
     * @param raRadians
     * @return String HH mm ss.s
     */
    public static String radiansToRA(final double raRadians) {
        return degreesToRA((raRadians * 180) / Math.PI);
    }

    public static String degreesToRA(double val) {
        // raneg reduction to [0.0,360.0)
        while (val < 0.0)
            val += 360.0;
        while (val >= 360.0)
            val -= 360.0;

        //if (val < 0.0 || val >= 360.0)
        //   throw new IllegalArgumentException("value "+val+" out of bounds: [0.0, 360.0)");

        // 24 hours/360 degrees = 15 deg/hour
        int h = (int) (val / 15.0);
        val -= h * 15.0;
        // 15 deg/hour == 0.25 deg/min == 4 min/deg
        int m = (int) (val * 4.0);
        val -= m / 4.0;
        // 4 min/deg == 240 sec/deg
        val *= 240.0;
        String d = Double.toString(val);
        String s = null;
        String hh = Integer.toString(h);
        String mm = Integer.toString(m);
        if (h < 10)
            hh = "0" + h;
        if (m < 10)
            mm = "0" + m;

        s = hh + ":" + mm + ":";
        return s + raFormat.format(val);
    }
}

Related

1. radianAdd(double a, double b)
2. radiancheck(double x)
3. radians(double d)
4. radians(double w)
5. radiansToBrads(double angleRadians)