Assorted Java facts and background information. Herewith then a collection of popular Java facts and background information we often get asked about. It is presented in a simple list format. What does i18n stand for ? What is the i18n.jar file (library) used for ? The i18n.jar class library is used for internationalization of Java-based applications. The i18n name is actually an abbreviated form of the word internationalization, where the i is followed by an 18 to represent that 18 characters in nternationalizatio and then the final n. All programs using Java's internationalization routines rely on this important class library. Please provide me with a list of all the Java reserved words. Here are the reserved words that we know of as of the 1st of May 2008. abstract default goto operator switch widefp Inactive boolean do if outer synchronized   words break double implements package this     byte else import private throw   byvalue byvalue extends inner protected throws   cast case false instanceof public transient   const cast final int rest true   future catch finally interface return try   generic char float long short var   inner class for native static void   operator const future new strictfp volatile   outer continue generic null super while   var

What are the Java primitives ? How large is an int in Java ? What is the capacity of an integer ? Type Contains Size Range byte Signed integer 8 bits -128 to 127 short Signed integer 16 bits -32768 to 32767 char Unsigned Unicode character 16 bits \u0000 to \uFFFF int Signed integer 32 bits -231 to 231-1 long Signed integer 64 bits -263 to 263-1 float Single precision IEEE standard 32 bits ±1.4 x 10-45 to ±3.4 x 1038 double Double precision IEEE standard 64 bits ±4.9 x 10-324 to ±1.8 x 10308 boolean True or False n/a true or false

What is 15 decimal in hex format ? What is the decimal value of the binary value 0111 ? How to convert between hex and decimal values ? Decimal Hex Octal Binary 0 0 0 0000 1 1 1 0001 2 2 2 0010 3 3 3 0011 4 4 4 0100 5 5 5 0101 6 6 6 0110 7 7 7 0111 8 8 10 1000 9 9 11 1001 10 A 12 1010 11 B 13 1011 12 C 14 1100 13 D 15 1101 14 E 16 1110 15 F 17 1111

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