Java language development into the line in mind

Interview

1.Java basic language data types: 8 types integer, floating-point type, char type and boolean types.

2. Remove the string specified element: abcabcabc delete ab.

3.ArrayList LinkedList class and class differences:

　　ArrayList class using internal memory array elements, support efficient random access, support dynamic resizing;

　　Internal storage element linked list LinkedList class enables quick insertion / deletion of elements, does not support efficient random access;

　　Vector class methods are all synchronized synchronized.

4. Security thread: Vector HashTable StringBuffer.

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