Java Utililty Methods Method Call

List of utility methods to do Method Call

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Description

The list of methods to do Method Call are organized into topic(s).

Method

Objectinvoke(Object obj, Method method, Object[] params)
invoke 
return method.invoke(obj, params);
Objectinvoke(Object obj, String method, Class[] params, Object[] args)

Invokes method of a given obj and set of parameters

try {
    return invoke_ex(obj, method, params, args);
} catch (Exception e) {
    throw new RuntimeException(e);
Objectinvoke(Object obj, String method, Class[] params, Object[] args)

Invokes method of a given obj and set of parameters

try {
    Class<?> clazz = null;
    if (obj instanceof Class) {
        clazz = (Class) obj;
    } else {
        clazz = obj.getClass();
    Method methods = clazz.getMethod(method, params);
...
Objectinvoke(Object obj, String method, Object param, Object paramType)
Invoke a method if it can be found! 
Object result = null;
Object[] params = null;
Class[] paramTypes = null;
if (param.getClass().isArray()) {
    params = (Object[]) param;
    paramTypes = (Class[]) paramType;
} else {
    params = new Object[1];
...
Objectinvoke(Object obj, String methodName)
invoke 
Class clazz = obj.getClass();
Method method = null;
try {
    method = clazz.getMethod(methodName);
} catch (Exception e) {
    throw new RuntimeException("Can not get the method[" + methodName + "] from the class["
            + clazz.getName() + "]! caused by: " + e.getMessage(), e);
try {
    return method.invoke(obj);
} catch (Exception e) {
    throw new RuntimeException("Unexpected exception occurs while invoking the method[" + methodName
            + "] in the class[" + clazz.getName() + "]! caused by: " + e.getMessage(), e);
Objectinvoke(Object obj, String methodName, boolean newValue)
invoke 
try {
    Method method = obj.getClass().getMethod(methodName, new Class[] { Boolean.TYPE });
    return method.invoke(obj, new Object[] { new Boolean(newValue) });
} catch (IllegalAccessException e) {
    throw new NoSuchMethodException(methodName + " is not accessible");
} catch (InvocationTargetException e) {
    throw new InternalError(e.getMessage());
Objectinvoke(Object obj, String methodName, Class argType, Object arg)
Call a method on the object with one argument. 
try {
    Method method;
    method = obj.getClass().getMethod(methodName, new Class[] { argType });
    return method.invoke(obj, new Object[] { arg });
} catch (Exception t) {
    throwBuildException(t);
    return null;
Objectinvoke(Object obj, String methodName, Class clazz, Object newValue)
Invokes the specified setter method if it exists. 
try {
    Method method = obj.getClass().getMethod(methodName, new Class[] { clazz });
    return method.invoke(obj, new Object[] { newValue });
} catch (IllegalAccessException e) {
    throw new NoSuchMethodException(methodName + " is not accessible");
} catch (InvocationTargetException e) {
    throw new InternalError(e.getMessage());
Objectinvoke(Object obj, String methodName, Class[] parameterTypes, Object[] args)
invoke 
if (parameterTypes == null)
    parameterTypes = EMPTY_CLASSES;
Method method = obj.getClass().getMethod(methodName, parameterTypes);
if (args == null)
    args = EMPTY_PARAMS;
return method.invoke(obj, args);
Objectinvoke(Object obj, String methodName, Object... args)
This metho can help invoke the private method of the object, but it needs to cast the type of the result. 
Class[] types = new Class[args.length];
Class tmp = null;
for (int i = 0; i < types.length; i++) {
    tmp = args[i].getClass();
    if (Proxy.class.isAssignableFrom(tmp)) {
        if (tmp.getInterfaces() == null || tmp.getInterfaces().length == 0) {
            if (!Proxy.class.isAssignableFrom(tmp.getSuperclass())) {
                tmp = tmp.getSuperclass();
...