java stringbuilder example

= System.currenttimemillis ();(int i = 0; i 37.sb3.setlength (0);Sb3.append ("somestr55ing");Sb3.append ("Some44string2");Sb3.append ("som55estrin4g");Sb3.append ("some66str5ing");Sb3.append ("so33mest7ring");A= sb3.tostring ();45.}System.out.println ("way3=" + (System.currenttimemillis ()-time));47.48.49.}50.}Note that the append string is not the same, otherwise the result will be affected by the Java string pool (i.e. 3 better than 2)Results:1.way

= new string (CHS); SYSTEM.OUT.PRINTLN (ss);}}String cannot be made into stringsStringBuilder variable stringThe object generated by this class will have a length of 16 characters by defaultstring{char[]+ algorithm (does not change content, often returns new strings)}Stringbuilder{char[] + algorithm (changed the content of char[], when capacity is insufficient, to expand operation)}String and StringBuilder

Today, when I was reading a book on Android, I met something of the StringBuilder type. I am a little confused. I don't know how it relates to the string and stringbuffer types. Please check the relevant information, I have learned a rough idea and share it with you: I believe that you have already understood the differences between String and StringBuffer, but it is estimated that many comrades may not be clear about the working principles of these t

Introduction:The producer-consumer model of the operating system curriculum can be said to be the best example of learning concurrency. It is important to note that Java does not support processes and only supports multithreading. This article will explain Java concurrency in one of the simplest producer consumer models. Learning this blog post you should have le

Original address: http://www.cnblogs.com/xudong-bupt/p/3961159.htmlIn Java, String, StringBuffer, and StringBuilder are frequently used strings in programming, and the differences between them are frequently asked questions in the interview. Now summarize and see how they differ from the same.1. Variable and non-changeable　　The string class uses a character array to hold strings, as follows, because there i

I personally think it is important to understand the difference between string and StringBuffer and StringBuilder. In discussing their differences, we should first know the string in Java.string is discussed first.Look at String.java source, you will know an important secret of string:In string, the inside is a char array to maintain the string, and also defines an index that records the string's starting position in the array, and defines the length

speed of execution: StringBuilder > stringbuffer 2. StringBuffer and StringBuilder, they are string variables, are objects that can be changed, and whenever we use them to manipulate strings, we actually operate on an object and do not create objects like string to manipulate them, so the speed is fast.3. StringBuilder: Thread non-secureStringBuffer: Thread

In Java, String, StringBuffer, and StringBuilder are frequently used strings in programming, and the differences between them are frequently asked questions in the interview. Now summarize and see how they differ from the same.1. Variable and non-changeable　　The string class uses a character array to hold strings, as follows, because there is a "final" modifier, so you know that the string object is immutab

environment without problems.) StringBuilder is non-thread safe. (use in a multithreaded environment may be problematic.) */publicclasstest01{publicstaticvoidmain (String[]args) {// Creates a string buffer object Stringbuffersb=newstringbuffer (); //16//can append strings to StringBuffer. String[] ins={"Sports", "Music", "Sleeping", "gourmet"};//recommended strings are frequently spliced using StringBuffer or stringbuilderfor (inti=0;iThis article is

test of the string class and the StringBuffer classThe execution effect is not absolute, depending on the hardware configuration of each machine.The first is the performance of the String classAnd then the StringBuffer class.In one is the comparison between the StringBuilder and the StringBuffer classHow to say the StringBuilder class is a class that appears starting with JDK5.0. Used to replace StringBuff

/wkiom1vpxdli6rvtaac6ccqzdhe717.jpg "width=" 648 "height=" 481 "alt=" wkiom1vpxdli6rvtaac6ccqzdhe717.jpg "/ > 2. StringBuilder, StringBuffer classWe have learned from the string class that it is an immutable object, so the creation of new objects is thrown whenever the content is modified. So when we have a need to frequently modify the string, this does not only not reduce the memory overhead, the return will increase the memory overhead. To th

No language can handle strings. Three classes of string, StringBuffer, and StringBuilder are processed in Java. What's the difference between the three of them?All three of them implemented the Charsequence interface. But the implementation process is different.in fact, their use of the method is very simple, here to see the use of StringBuilder. public class Tes

I. Overview string Processing in Java we often use Java to provide three classes to provide manipulation of strings, String,stringbuffer,stringbuilder String: fixed length stringbuffer: Non-fixed long thread safety Stringbuil