What does compilation exception refer to in java

Compilation exceptions are errors detected when compiling Java code and need to be fixed before compilation. Common types include syntax errors, type mismatches, duplicate identifiers, and unresolved symbols. The solution is to fix the underlying code error. Unlike runtime exceptions, compilation exceptions are detected at compile time and do not occur while the program is running. Avoiding compilation exceptions requires following Java syntax, ensuring type compatibility, avoiding duplicate identifiers, declaring all variables, inheriting correctly, and using an IDE to detect and fix errors.

Compilation Exceptions in Java

Compilation exceptions are errors detected while compiling Java code. These errors generate error messages at compile time and need to be fixed before compilation. Unlike runtime exceptions, compilation exceptions do not occur while the program is running.

Types of compilation exceptions

The Java compiler will detect various types of compilation exceptions, including:

• Syntax errors : Code that violates Java syntax rules.
• Type mismatch: Assign a value of one type to a variable of an incompatible type.
• Duplicate identifiers: Repeated definition of variables, methods or classes in the same scope.
• Unresolved symbol: Use of undeclared variable, method, or class.
• Inheritance error: Cannot inherit a class or interface from a parent class.

Handling compilation exceptions

In order to handle compilation exceptions, the underlying error must be resolved before compiling the code. This involves fixing the erroneous code and ensuring that it complies with Java syntax rules. Using an integrated development environment (IDE) can help detect and fix compilation exceptions because it often provides error messages and code suggestions.

Differences from runtime exceptions

Different from compilation exceptions, runtime exceptions are errors detected while the program is running. They are usually caused by errors in program logic, such as null pointer exceptions or array out-of-bounds exceptions. In contrast to compile exceptions, runtime exceptions do not generate errors at compile time and need to be handled at runtime using exception handling mechanisms.

Tips to avoid compilation exceptions

To avoid compilation exceptions, follow these tips:

• Follow Java syntax rules.
• Ensure type compatibility.
• Avoid duplication of identifiers.
• Declare all variables, methods and classes used.
• Inherit classes and interfaces correctly.
• Use an IDE to detect and fix errors.

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