《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();
    }
}