Java Primitive Type Create toPrimitive(Object o)

Description

to Primitive

License

Open Source License

Declaration

public static Object toPrimitive(Object o) 

Method Source Code

//package com.java2s;

public class Main {
    public static Object toPrimitive(Object o) {

        if (o == null)
            return null;

        Class<?> c = o.getClass();
        if (c.isPrimitive())
            return o;

        // In descending order of likelihood...
        if (c.equals(Void.class))
            return o;
        else if (c.equals(Boolean.class))
            return (boolean) (Boolean) o;
        else if (c.equals(Integer.class))
            return (int) (Integer) o;
        else if (c.equals(Double.class))
            return (double) (Double) o;
        else if (c.equals(Long.class))
            return (long) (Long) o;
        else if (c.equals(Character.class))
            return (char) (Character) o;
        else if (c.equals(Byte.class))
            return (byte) (Byte) o;
        else if (c.equals(Short.class))
            return (short) (Short) o;
        else if (c.equals(Float.class))
            return (float) (Float) o;

        return o;
    }/* www  .  j av a2 s  .co m*/

    /**
     * Gets the class with the given binary name using the given classLoader.
     * If a user-defined class isn't found with the given name, checks for primitive types.
     * 
     * @param className
     * @param classLoader
     * @return
     * @throws ClassNotFoundException
     */
    public static Class<?> getClass(String className, ClassLoader classLoader) throws ClassNotFoundException {

        try {
            return Class.forName(className, false, classLoader);
        } catch (ClassNotFoundException cnfe) {
            if (className.equals("Z") || className.equals("boolean"))
                return Boolean.TYPE;
            else if (className.equals("B") || className.equals("byte"))
                return Byte.TYPE;
            else if (className.equals("C") || className.equals("char"))
                return Character.TYPE;
            else if (className.equals("D") || className.equals("double"))
                return Double.TYPE;
            else if (className.equals("F") || className.equals("float"))
                return Float.TYPE;
            else if (className.equals("I") || className.equals("int"))
                return Integer.TYPE;
            else if (className.equals("J") || className.equals("long"))
                return Long.TYPE;
            else if (className.equals("S") || className.equals("short"))
                return Short.TYPE;
            else
                throw cnfe;
        }
    }

    /**
     * Returns true if obj1 and obj2 are both null, or if obj1.equals(obj2). Else returns false.
     * 
     * @param obj1
     * @param obj2
     * @return boolean
     */
    public static boolean equals(Object obj1, Object obj2) {

        if (obj1 == obj2)
            return true;
        if (obj1 == null || obj2 == null)
            return false;
        return obj1.equals(obj2);
    }
}

Related

1. toPrimitive(Integer[] ints)
2. toPrimitive(Integer[] irri)
3. toPrimitive(Long[] array)
4. toPrimitive(Long[] array)
5. toPrimitive(Long[] array)
6. toPrimitive(Object value)
7. toPrimitiveArray(Boolean[] a)
8. toPrimitiveArray(Byte[] array)
9. toPrimitiveArray(Byte[] bytes)