In this tutorial, we shall learn the intuition and realization of encapsulation in Java language with example programs. The below diagram gives an idea about Encapsulation in Java Points to be made from the above diagram are Variables (in the example: height, weight, bmi) are declared private,...
We have few methods through which java threads can communicate with each other. These methods arewait(),notify(),notifyAll(). All these methods can only be called from within a synchronized method. 1) To understand synchronization java has a concept of monitor. Monitor can be thought of as ...
CompletableFuture.anyOf() as the name suggests, returns a new CompletableFuture which is completed when any of the given CompletableFutures complete, with the same result. Consider the following example - CompletableFuture<String> future1 = CompletableFuture.supplyAsync(() -> { try { TimeUnit.SE...
When a variable contains null value and you are performing an operation on the variable. For example, if a string variable contains null and you are comparing with another string. Another example is when you are trying to print the length of the string that contains null. Stringstr=null;//...
Example: String greeting = "Hello, world!"; // String literal String path = "C:\\Program Files\\Java\\"; // String literal with backslashes String unicodeString = "\u03A9\u03B1\u03B2\u03B3"; // String literal with Unicode characters (Ωαβγ) ...
All the code in this example does is create a thread that prints a string to the standard output stream. The main thread waits for created (child) thread to complete by calling join(). Directly manipulating threads this way is fine for simple examples, but with concurrent programming, such ...
After you build either server-side or client-side classes with thejavaccompiler, if any of those classes will need to be dynamically downloaded by other Java virtual machines, you must ensure that their class files are placed in a network-accessible location. In this example, for Solaris or ...
Running the Example Programs A Note About Security The server and client programs run with a security manager installed. When you run either program, you need to specify a security policy file so that the code is granted the security permissions it needs to run. Here is an example policy fil...
Documentation comments start with/**and end with*/. By convention, each line of a doc comment begins with a*, as shown in the following example, but this is optional. Any leading spacing and the*on each line are ignored. Within the doc comment, lines beginning with@are interpreted as sp...
转换文件大小带单位(Convert file size with unit):fun formatSizeByTypeWithUnit(size: Long, scale: Int, sizeType: FileSizeType): String { return "${ formatSizeByTypeWithoutUnit(size.toBigDecimal(), scale, sizeType).toPlainString() }${sizeType.unit}" }...