Java Illegal State Exception
The java. lang package include several classes and
exceptional classes. This exceptional classes are the subclasses of run-time exception, that
is used further in exception handling. There are list of classes that are not
checked see the method have to be declared inside the class throw a list of
exception. while some other classes are checked. Java Illegal State Exception is
unchecked exception which provides you the information of illegal state
for application and the environment under which the application is running.
There are number of scenario in which two thread in Java Virtual Machine try
to access the same object. The first Thread tries to invalidates the Thread, while
the latter one try to access the same object where the thread been not exists. In
this case JVM throws java.lang. Illegal State Exception.
Understand Illegal State Exception with Example
In this example we want to show you the java illegal state Exception, In
java built-in exception classes, there are two type of constructor.One
with parameter, another with a String parameter that describe the type of exception. The
parameter that you passed in the constructor can be displayed when you passed
exception object as parameter to the System.out.println( )statement. The given
code describes you the use of constructor of the illegal state exception with
parameter passed as string.
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class ThrowDemonstration
{
static void throwDemonstration( )
{
try
{
throw new IllegalStateException("MyException");
}
catch(IllegalStateException
objA)
{
System.out.println("caught:" +objA);
}
}
public static void main(String args[])
{
throwDemonstration( );
}
}
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Output on Command Prompt
C:\Documents and Settings\Administrator>cd\
C:\>cd saurabh\
C:\saurabh>javac ThrowDemonstration.java
C:\saurabh>java ThrowDemonstration
caught:java.lang.IllegalStateException: MyException
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