Keyword in Java

Keywords, also known as reserved words, are predefined words in Java that have a specific meaning and are reserved for specific purposes. These keywords have predefined functionality and cannot be used as identifiers (such as variable names, class names, method names, etc.) in the program.

Here are the keywords in Java:

abstract    continue    for           new          switch
assert      default     if            package      synchronized
boolean     do          goto          private      this
break       double      implements    protected    throw
byte        else        import        public       throws
case        enum        instanceof    return       transient
catch       extends     int           short        try
char        final       interface     static       void
class       finally     long          strictfp     volatile
const       float       native        super        while

These keywords have specific meanings and are used to define the structure, flow, and behavior of Java programs. For example:

• class: Used to define a class.
• public: Specifies that a class, method, or field is accessible from any other class.
• void: Indicates that a method does not return a value.
• if, else: Used for conditional branching.
• for, while: Used for loop control.
• return: Used to return a value from a method.
• new: Used to create an instance of a class.
• static: Used to declare a class-level variable or method.

It's important to note that keywords are case-sensitive, so using variations of capitalization will result in a compilation error.

As these keywords have predefined meanings in Java, they cannot be used as identifiers in the program. Choosing appropriate names for variables, classes, and methods that do not conflict with Java keywords is important for writing valid and understandable code.