what are the runtime errors in java?
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Runtime errors are intermediate in difficulty. Java tells you where it discovered that your program had gone wrong, but you need to trace back from there to figure out where the problem originated. A logic error, or bug, is when your program compiles and runs, but does the wrong thing.
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An Exception is checked, and a RuntimeException is unchecked. Checked means that the compiler requires that you handle the exception in a catch, or declare your method as throwing it (or one of its superclasses).
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Unchecked Exception in Java is those Exceptions whose handling is NOT verified during Compile time . These exceptions occurs because of bad programming. The program won't give a compilation error. All Unchecked exceptions are direct subclasses of RuntimeException class.
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['String.', 'Integer.', 'Float (floating point numbers - also called double)', 'Boolean.', 'Array.', 'Object.', 'NULL.', 'Resource.']
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['the pathname for the application is incorrect,', 'the file named by the pathname is not recognized as an executable, or.', 'the executable is a 32 bit but for some reason it is trying to load a 664 bit DLL.']
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There are three kinds of errors: syntax errors, runtime errors, and logic errors. These are errors where the compiler finds something wrong with your program, and you can't even try to execute it. For example, you may have incorrect punctuation, or may be trying to use a variable that hasn't been declared.
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The culprit is Java 8 as iReport is not compatible with Java 8 run time - well at least version 3.7. 6 is not. To resolve this issue, simply install the Java 7 JDK (unless already installed) on the machine on which iReport is installed and then configure iReport to use the JDK rather than your local JRE.
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['local variable.', 'instance variable.', 'static variable.']
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ClassNotFoundException is an exception that occurs when you try to load a class at run time using Class. forName() or loadClass() methods and mentioned classes are not found in the classpath. NoClassDefFoundError is an error that occurs when a particular class is present at compile time, but was missing at run time.
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Class NoSuchMethodError Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method. Normally, this error is caught by the compiler; this error can only occur at run time if the definition of a class has incompatibly changed.
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Runtime and compile time are programming terms that refer to different stages of software program development. Compile-time is the instance where the code you entered is converted to executable while Run-time is the instance where the executable is running. ... Compiler crashes (Rarely)
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Compile-time and Runtime are the two programming terms used in the software development. Compile-time is the time at which the source code is converted into an executable code while the run time is the time at which the executable code is started running.
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try has almost no expense at all. Instead of doing the work of setting up the try at runtime, the code's metadata is structured at compile time such that when an exception is thrown, it now does a relatively expensive operation of walking up the stack and seeing if any try blocks exist that would catch this exception.
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The OutOfMemoryError Exception in Java looks like this: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space. Usually, this error is thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector.
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['setting up the JVM.', 'loading required classes.', "running static initializer blocks. This can execute user-defined code before main is invoked. These blocks aren't supposed to throw exceptions."]
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Compile time errors are those syntax errors, missing file reference errors. Runtime errors happen after the source code has been compiled into an executable program and while the program is running. Examples are program crashes, unexpected program behavior or features don't work.
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When you access Automation objects, specific types of errors can occur. This error has the following possible causes and solutions: An error occurred while executing a method or getting or setting a property of an object variable. The error was reported by the application that created the object.