5.Java Multi-Threading and Concurrency Interview Questions Multithreading and Concurrency is a hot topic in Java interviews. It’s good to have good knowledge of Threads in Java. This post covers 30+ interview
使用Thread类的setDaemon(true)方法可以将线程设置为守护线程,需要注意的是,需要在调用start()方法前调用这个方法,否则会抛出IllegalThreadStateException异常。 20. 什么是ThreadLocal? ThreadLocal用于创建线程的本地变量,我们知道一个对象的所有线程会共享它的全局变量,所以这些变量不是线程安全的,我们可以使用同步技术。...
final class may not be subclassed. This is done for security reasons with basic classes like String and Integer. It also allows the compiler to make some optimizations, and makes thread safety a little easier to achieve. A final method can’t be overridden when its class is inherited...
No, we cannot restart the thread, as once a thread started and executed, it goes to the Dead state. Therefore, if we try to start a thread twice, it will give a runtimeException "java.lang.IllegalThreadStateException". Consider the following example. publicclassMultithread1extendsThread { ...
Top Java Interview Questions And Answers – Set 5 1) Can a dead thread be started again? No, a thread that is in the dead state can't be started again. 2) Are arrays of primitive data types? No. In Java, Arrays are objects. 3) What are constructors in Java? In Java, the const...
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有两种创建线程的方法:一是实现Runnable接口,然后将它传递给Thread的构造函数,创建一个Thread对象;二是直接继承Thread类。若想了解更多可以阅读这篇关于如何在Java中创建线程的文章。5. 有哪些不同的线程生命周期?当我们在Java程序中新建一个线程时,它的状态是New。当我们调用线程的start()方法时,状态被改变为Runnable...
3.1. ThreadLocal简介 3.2. ThreadLocal示例 3.3. ThreadLocal原理 3.4. ThreadLocal 内存泄露问题 4. 线程池 4.1. 为什么要用线程池? 4.2. 实现Runnable接口和Callable接口的区别 4.3. 执行execute()方法和submit()方法的区别是什么呢? 4.4. 如何创建线程池 ...
Stack: Each thread which is created in JVM, a separate runtime-stack is also created at the same time. The local variables, method calls and intermediate results are stored in this stack area. But if the thread requires a larger stack size than what is available, JVM throws StackOverflow ...
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