Java Utililty Methods Reflection Primitive

List of utility methods to do Reflection Primitive

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Description

The list of methods to do Reflection Primitive are organized into topic(s).

Method

voidaddPrimitiveToWrapperRelation(Class primitiveClass, Class wrapperClass)
add Primitive To Wrapper Relation 
PRIMITIVE_TO_WRAPPERS_MAP.put(primitiveClass, wrapperClass);
WRAPPERS_TO_PRIMITIVE_MAP.put(wrapperClass, primitiveClass);
floatcalculateDistancePrimitive(Class a, Class b)
calculate Distance Primitive 
if (b == Character.class || b == Boolean.class)
    return -1F;
if (a == Character.class)
    a = Short.class;
int indexA = PRIMITIVE_WIDENING.indexOf(a);
int indexB = PRIMITIVE_WIDENING.indexOf(b);
if (indexA < 0 || indexB < 0)
    return -1F;
...
booleancanCoerceLiteralNumberExpr(Class type)
can Coerce Literal Number Expr 
final List<? extends Class<?>> classes = Arrays.asList(int.class, long.class, double.class);
return classes.contains(type);
TcastToPrimitive(Object start, Class prim)
cast To Primitive 
try {
    if (start == null) {
        return (T) defaultPrimitiveValues.get(prim);
    if (start instanceof Boolean) {
        start = ((Boolean) start) ? 1 : 0;
    if (start instanceof Character) {
...
ClassconvertPrimitiveToObjectClass(Class clazz)
The class equivalent of (manual) autoboxing. 
if (isPrimitiveClass(clazz)) {
    return primitiveToObjectClassMap.get(clazz);
return clazz;
ClassconvertPrimitiveToWrapper(Class clazz)
Gets the equivalent class to convert to if the given clazz is a primitive. 
if (clazz == null || !clazz.isPrimitive())
    return clazz;
return (Class) primativeToWrapperMap.get(clazz);
ClassconvertPrimitiveToWrapper(Class clazz)
Checks whether a given class object is a primitive and returns its wrapper class (except for void where always the primitive class is used). 
Class<?> result = clazz;
if (clazz.isPrimitive()) {
    return primitiveWrapperClasses.get(clazz.getName());
return result;
ClassconvertToPrimitive(Class type)
convert To Primitive 
if (type == null || type.isPrimitive()) {
    throw new IllegalArgumentException(
            "Given class type is wrong. Either it is null or is a primitive. given-class[" + type + "]");
return wrapperToprimitives.get(type);
ClassconvertWrapperToPrimitive(Class clazz)
convert Wrapper To Primitive 
Class<?> result = clazz;
if (!clazz.isPrimitive()) {
    return wrapperPrimitiveClasses.get(clazz.getName());
return result;
KcreateDefaultPrimitive(Class type)
Returns the default value (JLS 4.12.5) of a primitive type. 
return type.cast(PRIMITIVE_DEFAULTS.get(type));