Java Interview Common Questions

1. String S1 = ' 123 ';

String s2 = new string ();

2. The difference between two ways of implementing multithreading

Inheriting the thread and implementing the Runnable interface

3. Single-column design mode What's the difference between lazy and a hungry man? * * *

Lazy style Features: lazy loading. Delayed loading in multi-threaded security problems, through the addition of synchronization to solve, plus synchronization efficiency is low, with a double-judge method to solve the low efficiency. The byte-code object (i.e., the class file) is used when synchronizing. 11 days-14-multithreading (multithreading-Singleton design mode-lazy type)

4. Write a deadlock program * * *

Java Interview Common Questions