Category Archive for: The Complete Reference

Using break as a Form of Go to

Using break as a Form of Go to In addition to its uses with the switch statement and loops, the break statement can also be employed by itself to provide a “civilized” form of the go to statement. Java does not have a go to statement, because it provides a way to branch in an…

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Nested Loops

Nested Loops Like all other programming languages, Java allows loops to be nested. That is, one loop may be inside.another. For example, here is a program that. nests for loops Java supports three jump statements: break, continue, and return. These statements transfer contralto another part of your program. Each is examined heu. addition to the jump statements discussed…

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Iteration Statements

Iteration Statements Java’s iteration statements are for, while, and do-while. These statements create what we commonly call/oops. As you probably know, a loop repeatedly executes the same set of instructions until a termination condition is met. As you will see, Java has a loop to fit any programming need. while The while loop is Java’s most fundamental looping…

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Some for Loop Variations

Some for Loop Variations The for loop  a number of variations that increase its power and applicability. The reason it is so flexible is’that its three parts, the initialization, the conditional test, and the iteration, do not need to be used for only those purposes. In facl, the three. sections of the for can be used for you…

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The Java Thread model

The Java Thread model The Java run-time system depends on threads for many things, and’ all the class libraries are-designed with multithreading in mind. In fact, Java uses threads to enable the entire environment to be asynchronous. This helps reduce inefficiency by preventing the waste of Cl’U cycles. . The value of a multithreaded environment is best understood in…

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Thread Priorities

Thread Priorities Java assigns to each thread a priority that determines how that thread should be treated with respect to the others. Thread priorities are integers that specify the relative priority of one thread to another. As an absolute value, a-priority is meaningless higher-priority thread doesn’t flm-any faster than a lower-priority thread Wit is the only thread running. Instead,…

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Synchronization

Synchronization Because multithreading introduces an asynchronous behavior to your programs, there must be a way for you to enforce synchronicity when you need it. For example, if you want two threads to communicate and share a complicated data structure, such as a linked list, you need some way to ensure that they don’t conflict with each other. That is,…

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Messaging

Messaging After you divide your program into separate threads, you need to define how they will communicate with each other. WheN programming with most other languages, you must depend on the operating system to establish communication between threads. This, of course, adds overhead. By contrast, Java Provides o clean. low-cost way for two or more threads to talk to…

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The Thread Class and the Runnable Interface

The Thread Class and the Runnable Interface Java’s multithreading system is built upon the Thread class, its methods, and its companion interface, Runnable. Thread encapsulates a thread of execution. Since you can’t directly refer to the ethereal state of a running thread, you will deal with it through its proxy, the Thread instance that spawned it. To create…

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Creating a’Thread

Creating a’Thread In the most general sense, you’ create a thread.by instantiating an object of type Thread. Java defines two ways in which this can be’ accomplished: • You can implement the Runnable interface. • You can extend the Thread class, itself. The following two sections look at each method’, in turn. Implementing Runnable The easiest…

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