import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "ERROR[\\S\\s]*?(?=\\s+INFO|DEBUG|WARN)";
final String string = "ERROR 2017/12/12 00:11:34.352 Error: {0} System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> OutboundServiceSoftFailureException: Failure executing request against aggregation service: Object reference not set to an instance of an object. at ProxyAggregationService.Execute[T](ILog log, Request request) at ResetChangeRequestForMAF(String mafGuid, String senderCode) at HandleImpl(CleanupWorkbookRequest request) at UnitRequestHandler`1.Handle(TRequest request) at ExecuteInternal[TRequest,TResponse](TRequest request) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at ExecuteUnknown(Object request) at InvokeMethodOnTarget() at CProceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation)\n\n"
+ " DEBUG 2017/12/12 00:11:35.300 Process entered blah blah bla\n\n"
+ " WARN 2017/12/12 00:11:37.300 Possible problem with some process\n"
+ "ERROR 2017/12/12 00:11:34.352 Error: {0} System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> OutboundServiceSoftFailureException: Failure executing request against aggregation service: Object reference not set to an instance of an object. at ProxyAggregationService.Execute[T](ILog log, Request request) at ResetChangeRequestForMAF(String mafGuid, String senderCode) at HandleImpl(CleanupWorkbookRequest request) at UnitRequestHandler`1.Handle(TRequest request) at ExecuteInternal[TRequest,TResponse](TRequest request) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at ExecuteUnknown(Object request) at InvokeMethodOnTarget() at CProceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation)\n"
+ " WARN 2017/12/12 00:11:37.300 Possible problem with some process\n\n"
+ "ERROR 2017/12/12 00:11:34.352 Error: {0} System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> OutboundServiceSoftFailureException: Failure executing request against aggregation service: Object reference not set to an instance of an object. at ProxyAggregationService.Execute[T](ILog log, Request request) at ResetChangeRequestForMAF(String mafGuid, String senderCode) at HandleImpl(CleanupWorkbookRequest request) at UnitRequestHandler`1.Handle(TRequest request) at ExecuteInternal[TRequest,TResponse](TRequest request) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at ExecuteUnknown(Object request) at InvokeMethodOnTarget() at CProceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation)\n\n"
+ " TEST 2017/12/12 00:11:35.300 Process entered blah blah bla\n\n"
+ "ERROR 2017/12/12 00:11:34.352 Error: {0} System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> OutboundServiceSoftFailureException: Failure executing request against aggregation service: Object reference not set to an instance of an object. at ProxyAggregationService.Execute[T](ILog log, Request request) at ResetChangeRequestForMAF(String mafGuid, String senderCode) at HandleImpl(CleanupWorkbookRequest request) at UnitRequestHandler`1.Handle(TRequest request) at ExecuteInternal[TRequest,TResponse](TRequest request) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at ExecuteUnknown(Object request) at InvokeMethodOnTarget() at CProceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation) at AbstractInvocation.Proceed() at Intercept(IInvocation invocation)\n\n"
+ " INFO 2017/12/12 00:11:35.300 Process entered blah blah bla";
final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html