《Cracking the Coding Interview》——第14章：Java——题目3

2014-04-26 18:59

题目：final、finally、finalize有什么区别？

解法：烂大街之java语法题。此题被多少公司考过我不知道，反正我确实遇见过一次了。

代码：

 1 // 14.3 final, finally and finalize, what are they?
 2 // you can't inherit me
 3 public final class TestJava {
 4     // you can't modify me
 5     public final int i = 123;
 6     public final int j;
 7     
 8     public TestJava () {
 9         j = 2;
10         // you can't modify me again.
11         // j = 3;
12     }
13     
14     // you can't override me
15     public final void f() {
16         System.out.println("TestJava.f()");
17     };
18     
19     // a substitute for ~TestJava().
20     // it signifies it is ready to be collected, but it doesn't have to be destroyed immediately.
21     @ Override
22     protected void finalize() {
23         System.out.println("finalized");
24     };
25     
26     public static void main(String[] args) {
27         TestJava testJava = new TestJava();
28         testJava.f();
29         testJava.finalize();
30     }
31 }