Java Error Messages and Solutions

We get error message "class [ClassName] is public, should be declared in a file named [ClassName].java" if the file name of the Ja...

'Exception in thread "main" java.lang.NoSuchMethodError: main' is a run time error message. If the main method is not prop...

If we declare a variable in a method more than once than we see ' is already defined'. Find out the variable for which the message ...

The error 'reached end of file while parsing' occurs because of curly braces } problem. You have given either more or less curly bra...

You may see the error message 'possible loss of precision' for any of the following reasons: 1) You are trying to assign a fractio...

We know that the maximum value of an int is 2147483647. If we write any whole number more than 2147483647 in our Java program, we may get th...

Each java statement must ends with ; (semicolon) in Java. If we don’t put ; after any statement we will see ‘;’ expected Here is an exampl...

We see “variable might not have been initialized” when we try to use the value of a variable before assigning any value to that variable. Ea...

If we put a ; (semicolon) after the method header (i.e., before starting the method body) when we are defining a concrete method (which meth...

Programmers may see message “else without if” when the selection (if ... else if ... else) structure is used. This may happen for any of the...