Java Utililty Methods Object Type Case

List of utility methods to do Object Type Case

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Description

The list of methods to do Object Type Case are organized into topic(s).

Method

CcastOrNull(Object o, Class clazz)
cast Or Null 
if (clazz.isAssignableFrom(o.getClass())) {
    return (C) o;
} else {
    return null;
TcastOrNull(Object o, Class cls)
Cast object to class or return null. 
if (o == null)
    return null;
if (cls.isInstance(o))
    return cls.cast(o);
return null;
T2castOrThrowError(Class clazz, T1 object, String messageTemplate)
Attempts to cast an object to a given class, and if that does not succeed, throws an error with a message generated from a template following the format conventions of String#format(String,Object) , with formatting arguments being the object being cast, and the expected and actual received classes' simple names, in this order. 
T2 result;
try {
    result = clazz.cast(object);
} catch (ClassCastException e) {
    String message = String.format(messageTemplate, object, clazz.getSimpleName(),
            object.getClass().getSimpleName());
    throw new Error(message);
return result;
TcastSafe(Class inClass, Object inValue, T inDefault)
cast Safe 
if (inClass == null) {
    throw new IllegalArgumentException("no target class specified");
} else if (inValue != null && !inClass.isAssignableFrom(inValue.getClass())) {
    return inDefault;
try {
    return (T) inValue;
} catch (Exception e) {
...
Stringcaststring1(String tmpq)
caststring 
String tmp1 = "";
if (tmpq.indexOf("-") <= 0) {
    int tt = tmpq.indexOf(".");
    if (tt > 0)
        tmp1 = tmpq.substring(0, tt);
    else
        tmp1 = tmpq;
} else {
...
TcastTo(Object o, Class cls)
cast To 
Class<? extends Object> oc = o.getClass();
if (cls.isAssignableFrom(oc))
    return (T) o;
System.out.println("ReflectionUtils.castTo() -- returning null");
return null;
Object[]castToArray(Object object)
cast To Array 
Object[] array = null;
if (object != null) {
    if (object instanceof String) {
        array = EMPTY_ARRAY;
    } else {
        array = (Object[]) object;
return array;
NumbercastToClass_strict(Number valueIn, Class toClassIn)
Method for intelligently converting between Number classes. 
if (valueIn == null)
    return null;
if (valueIn.getClass() == toClassIn)
    return valueIn;
boolean hasFractionalComponent = (Math.floor(valueIn.doubleValue()) != valueIn.doubleValue());
if (hasFractionalComponent && (toClassIn.equals(Byte.class) || toClassIn.equals(Short.class)
        || toClassIn.equals(Integer.class) || toClassIn.equals(Long.class)))
    return null;
...
FloatcastToObject(Object value)
cast To Object 
return (Float) value;
ObjectcastToPrimitive(Object value, String targetType)
cast To Primitive 
if (value instanceof Number) {
    Number castValue = (Number) value;
    if ("B".equals(targetType) || "Ljava/lang/Byte;".equals(targetType)) {
        return castValue.byteValue();
    } else if ("D".equals(targetType) || "Ljava/lang/Double;".equals(targetType)) {
        return castValue.doubleValue();
    } else if ("F".equals(targetType) || "Ljava/lang/Float;".equals(targetType)) {
        return castValue.floatValue();
...