《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：

 // 14.3 final, finally and finalize, what are they?
 // you can't inherit me
 public final class TestJava {
     // you can't modify me
     public final int i = 123;
     public final int j;

     public TestJava () {
         j = 2;
         // you can't modify me again.
         // j = 3;
     }

     // you can't override me
     public final void f() {
         System.out.println("TestJava.f()");
     };

     // a substitute for ~TestJava().
     // it signifies it is ready to be collected, but it doesn't have to be destroyed immediately.
     @ Override
     protected void finalize() {
         System.out.println("finalized");
     };

     public static void main(String[] args) {
         TestJava testJava = new TestJava();
         testJava.f();
         testJava.finalize();
     }
 }