When you write Java code in a .java file, the Java compiler ( javac ) translates the human-readable source code into an intermediate form called (saved as a .class file).
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float (4 bytes), double (8 bytes). Textual: char (2 bytes, uses Unicode character encoding). Logical: boolean (true/false, size is JVM dependent). Reference Data Types
It compiles source code ( .java ) into bytecode ( .class ), which can execute on any operating system equipped with a matching Java Virtual Machine (JVM). When you write Java code in a
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Evaluated by the compiler (e.g., IOException , SQLException ). The programmer must handle them using try-catch blocks or declare them using the throws keyword. Inner Classes float (4 bytes), double (8 bytes)
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Architectural design principles aimed at creating highly maintainable codebases. Module 3: Exception Handling
Prevents thread interference and memory consistency errors when multiple threads share resources. Applying the synchronized keyword to a method or a block ensures that only one thread can access the resource at any given moment.
Java is a statically typed language, meaning all variables must be declared before use. Data types are split into two categories: Primitive Data Types