java 1 7 features with examples

Java-10.6 finally (1)-Features In this chapter, we will discuss finally. Feature: finally can always be executed. package com.ray.ch10;public class Test {private void test() throws Exception {throw new Exception();}public static void main(String[] args) {try {new Test().test();} catch (Exception e) {e.printStackTrace();} finally {System.out.println(finally);}}}

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Java 8 new features 1-function interface OriginalLAMBDA Expression Basic structure:(PARAM1,PARAM2,PARAM3), { code block }Example 1:Package Com.demo.jdk8;import Java.util.arrays;import Java.util.list;import Java.util.function.consumer;public class Test2 {public static void main (string[] args) {for_test (); For_newmetho

more additions and deletions: LinkedList104 query MORE: ArrayList the I don't know, just use ArrayList.106 I don't know, just use ArrayList.107 108 3: Common methods of collection and Traverse mode 109 　　 Collection: the Add ()111 Remove () the contains ()113 iterator () the size () the the 　　　 Traversal:　117 Enhanced for118 iterators119 -|--List121 get ()122 123 Traversal:124 General for the|--Set126 127 　　 Map: - put ()129 Remove () the Con

1 Package: Package is to ensure that the software has a good modular basis, is to achieve the software components of the "high cohesion", "low coupling." In the programming of Face objects, the object is the most basic unit of encapsulation.2 Inheritance: When defining and implementing a class, you can do it on the basis of an existing class, the content defined by the already existing class as its own content, and can add a number of new content, or

-s /usr/local/java/jdk-1.8/bin/java /sbin/javaAs indicated by the completionReport:Running java-version without the relevant version information, the following error occurred:DL failure on line 685error:failed/usr/local/jdk-1.8/jre/lib/i386/client/libjvm.so, because/usr/local/jdk-1.8/jre/ Lib/i386/client/libjvm.so:cannot Restore segment prot after Reloc:permissi

1. () The organization is responsible for overseeing the evolution of Java-related technical specifications.A. JCPB. ApacheC. EUD. The Consortium2.Java specifications must be submitted for review in () official documents.A. RFCB. JSRC. ISOD. IEEEThe original code extension of 3.Java and the correct extension after comp

key, the value will be saved there. The preceding method provides a method for calculating the Hash code based on the return value of hashCode (): The indexFor () method is called to calculate the index of the object that should be stored in the table array. The source code is as follows: static int hash(int h) { // This function ensures that hashCodes that differ only by // constant multiples at each bit position have a bounded // number of collisions (approximately 8 at

port number with a unique identity on the network can be combined to form a uniquely identifiable identifier socket. socket principle mechanism:? There are sockets on both ends of the communication. ? network communication is actually the communication between sockets. ? data is transmitted via IO between two sockets. UDP Transport Datagramsocket and Datagrampacket establish the sending end, the receiving end. set up the data package. invokes the Send receive method of th