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final/finally/finalize的含义
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考题
final,finally,finalize三个关键字的区别有()
A.final是修饰符(关键字)可以修饰类、变量、方法B.finally在异常处理时使用,提供finally块来执行任何清除操作C.finalize是方法名,在垃圾收集器将对象从内存中清除出去之前做必要的清理工作D.finally和finalize一样都是用于异常处理的方法
考题
final,finally,finalize三个关键字的区别有()。
A.final是修饰符(关键字)可以修饰类、变量、方法B.finally在异常处理时使用,提供finally块来执行任何清除操作C.finalize是方法名,在垃圾收集器将对象从内存中清除出去之前做必要的清理工作D.final和finalize一样都是用于异常处理的方法
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Java语言有自动收集垃圾的功能,会周期性地回收一些长期不用的对象占用的内存。下列选项中为对象清除路径的是( )。 Ⅰ.依靠Java的垃圾回收机制回收内存 Ⅱ.调用System.gc(),请求垃圾回收 Ⅲ.Java系统开始运行时,自动调用java.Objeet.finalize()释放内存 Ⅳ.在程序中调用重写的finalize()方法释放系统资源,其格式为: protected void finalize() throws throwable { ... super.finalize.(); }A.Ⅰ、ⅢB.Ⅰ、Ⅱ、Ⅲ、ⅣC.Ⅰ、Ⅱ、ⅢD.Ⅱ、Ⅲ、Ⅳ
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Java语言有自动收集垃圾功能,周期性的回收一些长期不用的对象占用的内存。下列哪些是对象的清除的途径? ①依靠Java的垃圾回收机制回收内存 ②调用System.gc( ),请求垃圾回收 ③Java系统开始运行时,自动调用java.lang.Object.finalize( )释放内存 ④在程序中调用重写的finalize( )释放系统资源,其格式为: protected void finalize( )throws throwable { … super.finalize( ); }A.①③B.①②③④C.①②③D.②③④
考题
final,finally,finalize三个关键字的区别有()。 A、final是修饰符(关键字)可以修饰类、变量、方法B、finally在异常处理时使用,提供finally块来执行任何清除操作C、finalize是方法名,在垃圾收集器将对象从内存中清除出去之前做必要的清理工作D、final和finalize一样都是用于异常处理的方法
考题
final, finally, finalize三个关键字的区别有() A、final是修饰符(关键字)可以修饰类、变量、方法B、finally在异常处理时使用,提供 finally 块来执行任何清除操作C、finalize是方法名,在垃圾收集器将对象从内存中清除出去之前做必要的清理工作D、finally和finalize一样都是用于异常处理的方法
考题
Which two declarations prevent the overriding of a method? ()A、 Final void methoda(){}B、 Void final methoda(){}C、 Static void methoda(){}D、 Static final void methoda(){}E、 Final abstract void methoda(){}
考题
final、finally和finalize的区别中,下述说法正确的有()。A、final用于声明属性,方法和类,分别表示属性不可变,方法不可覆盖,类不可继承B、finally是异常处理语句结构的一部分,表示总是执行C、finalize是Object类的一个方法,在垃圾收集器执行的时候会调用被回收对象的此方法,可以覆盖此方法提供垃圾收集时的其他资源的回收,例如关闭文件等D、引用变量被final修饰之后,不能再指向其他对象,它指向的对象的内容也是不可变的
考题
Which statement is true?()A、A class’s finalize() method CANNOT be invoked explicitly.B、super.finalize() is called implicitly by any overriding finalize() method.C、The finalize() method for a given object is called no more than once by the garbage collector.D、The order in which finalize() is called on two objects is based on the order in which the two objects became finalizable.
考题
多选题Which two are true?()AA finalizer may NOT be invoked explicitly.BThe finalize method declared in class Object takes no action.Csuper.finalize()is called implicitly by any over riding finalize method.DThe finalize method for a given objec twill be called no more than once by the garbage collector.EThe order in which finalize will be called on two objects is based on the order in which the two objects became finalizable.
考题
单选题Which statement is true?()A
A class’s finalize() method CANNOT be invoked explicitly.B
super.finalize() is called implicitly by any overriding finalize() method.C
The finalize() method for a given object is called no more than once by the garbage collector.D
The order in which finalize() is called on two objects is based on the order in which the two objects became finalizable.
考题
单选题Object类的finalize()方法是如何声明的()。A
public void finalize()B
protected int finalize()C
C.protected void finalize(intD
protected void finalize()throws Throwable
考题
多选题final、finally和finalize的区别中,下述说法正确的有()。Afinal用于声明属性,方法和类,分别表示属性不可变,方法不可覆盖,类不可继承Bfinally是异常处理语句结构的一部分,表示总是执行Cfinalize是Object类的一个方法,在垃圾收集器执行的时候会调用被回收对象的此方法,可以覆盖此方法提供垃圾收集时的其他资源的回收,例如关闭文件等D引用变量被final修饰之后,不能再指向其他对象,它指向的对象的内容也是不可变的
考题
单选题Exhausted from a day of hiking across steep, rain-soaked paths, the group of campers were relieved upon the final reaching of the car.A
group of campers were relieved upon the final reaching of the carB
camping group became relieved after they got to the carC
group of campers was relieved to finally reach the carD
campers were relieved after the car was finally reachedE
group was relieved after the campers finally reached the car
考题
多选题final, finally, finalize三个关键字的区别有()Afinal是修饰符(关键字)可以修饰类、变量、方法Bfinally在异常处理时使用,提供 finally 块来执行任何清除操作Cfinalize是方法名,在垃圾收集器将对象从内存中清除出去之前做必要的清理工作Dfinally和finalize一样都是用于异常处理的方法
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