Java API (ii)

Array Advanced and Arrays (master)

1. Sorting

2. Find

3. Arrays Tool Class

Integer (Master)

1, in order to let the basic type of data for more operations, Java for each of the basic type provides a corresponding wrapper class type Byte ByteshortShortintIntegerlongLongfloatFloatdoubleDoublecharCharacterbooleanBoolean2, Integer construction method A:integer i = new Integer (100); B:integer i = new Integer ("100"); Note: Here the string must be composed of numeric characters 3, string and int a:string-intinteger.parseint ("100"); B:int--stringstring.valueof (100); 4, other functions (understanding) Binary conversion 5, new features of JDK5 automatic boxing basic type--reference type automatic unpacking reference type--basic type the following code is understood: Integer i = 100;i + = 200;6, interview questions-data buffer pool issues between 128 and 127

Character (Learn)

1, Character construction method Character ch = new Character (' a '); 2, to Master the method: (self-completion) A: Determine whether the given character is uppercase B: Determine whether the given character is lowercase C: Determine whether the given character is a numeric character D: Turns the given character into uppercase E: turns the given character into lowercase 3, case: The number of uppercase, lowercase, and numeric characters in the statistics string

Java API (ii)