Appendix B. Comparing Java and C# keywords Table B.1 shows the closest matching C# equivalents to the 49 Java keywords. Table B.1. C# equivalents to Java keywords | Java keyword | Closest C# equivalent | Comments | | abstract | abstract | | | assert [3] | - | Use the Debug.Assert static method in C# instead | | boolean | bool | | | break | break | | | byte | sbyte | An sbyte is a signed 8-bit numeric simple type, while byte is an unsigned 8-bit numeric simple type in C# “ Java's primitive types are all signed | | case | case | | | catch | catch | | | char | char | | | class | class | | | const* | const | This keyword is reserved in Java, but not used “ in C#, const is used to declare a constant | | continue | continue | | | default | default | | | do | do | | | double | double | | | else | else | | | extends | - | In C#, : is used to denote class inheritance instead of using the extends keyword | | native | extern | | | final | const / readonly | Java final variables are similar to C# constants and read-only variables , though there are differences between the latter two | | finally | finally | | | float | float | | | for | for | | | goto [1] | goto | Java's goto keyword has no functionality although it is reserved “ C#'s goto keyword can be used to 'jump' to a labeled statement | | if | if | | | implements | - | In C#, : is used to denote interface implementation instead of using the implements keyword | | import | using | | | instanceof | is | | | int | int | | | interface | interface | | | long | long | | | native | extern | | | new | new | | | package | namespace | | | private | private | | | protected | protected | | | public | public | | | return | return | | | short | short | | | static | static | | | strictfp [2] | - | | | super | base | | | switch | switch | | | synchronized | lock | | | this | this | | | throw | throw | | | throws | - | All exceptions in C# are unchecked “ unchecked exceptions are automatically propagated backwards to the calling method if not handled without the need to specify the throws clause in the method prototype | | transient | - | | | try | try | | | void | void | | | volatile | volatile | | | while | while | | [3] added into the Java language in Java 2 SDK 1.4 [1] reserved but not used in Java [2] added into the Java language in Java 2 |