Here you can find the source of getExceptionCauseUsingWellKnownTypes(final Throwable exception)
private static Throwable getExceptionCauseUsingWellKnownTypes(final Throwable exception)
//package com.java2s; /*// w w w .j a va 2 s .co m * Copyright 2015 Cisco Systems, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.lang.reflect.InvocationTargetException; import java.sql.SQLException; public class Main { private static Throwable getExceptionCauseUsingWellKnownTypes(final Throwable exception) { if (exception instanceof SQLException) { return ((SQLException) exception).getNextException(); } else if (exception instanceof InvocationTargetException) { return ((InvocationTargetException) exception).getTargetException(); } else { return null; } } }