stringbuilder sample

Ext.: http://www.cnblogs.com/pepcod/archive/2013/02/16/2913557.htmlThere are three classes commonly used in Java for working with strings:Java.lang.String,Java.lang.StringBuffer,Java.lang.StringBuilder,All three are in the final category and are not allowed to be inherited, primarily in terms of performance and security, since these classes are often used and are considered to prevent the modification of the parameters in them from affecting other applications. StringBuffer and

Select string and stringbuilder in C # 14:26:54 let me say a few words FavoritesI want to contribute [Font: small and big] in many cases, stringbuilder is faster and faster than string during String concatenation. the fact is that stringbuilder is faster than string because an intermediate object is gene

Differences between String, StringBuffer, and StringBuilder in javaIn java, String, StringBuffer, and StringBuilder are String classes that are frequently used in programming. The differences between them are also frequently asked during interviews. Now, let's take a look at their differences and similarities. 1. Use character arrays in variable and immutable String classes to save strings. The following fi

The difference between string and StringBuilder is not described in detail here. After all, there are a lot of articles on the Internet. Here I will directly post a comparison of new capabilities for testing. You will know the differences between them at a glance. First, let's briefly explain string and StringBuilder; The string object cannot be changed. Every time you use a method in the System. String cla

Today, at Csdn's College club, I saw "Java Fundamentals test". Feel like you've learned Java for so long that you want to see what your Java level is. The test results will not say, anyway, is dire can't bear to see.Look at the results analysis, about StringBuilder, StringBuffer, String class three questions all answer wrong. So I looked up some information and recorded it.The value of string is immutable, which results in a new string object being ge

StringTest01 {public static void main (string[] args) {//TODO auto-generated method stubstring hello= "Hello"; String Hel1=hello; String hel2= "Hel"; String hel3=hel2+ "Lo"; String hel4=hel2.concat ("Lo"); System.out.println (hello); System.out.println (HEL1); System.out.println (HEL3); System.out.println (hel4);//== equals test System.out.println (HELLO==HEL1); System.out.println (HELLO==HEL3); System.out.println (HELLO==HEL4); System.out.println (hel3==hel4);//equals function Test System.out.

is "start", this method invocation of Z.append ("le") causes the string buffer to contain "startle" and Z.insert (4, "le") changes the string buffer to include the " Starlet ". 3 StringBuilderStringBuilder: String variable (not thread safe).Java.lang.StringBuilder is a variable sequence of characters that is added to JDK5.0. This class provides an API that is compatible with StringBuffer, but does not guarantee synchronization. This class is designed as a simple replacement for stringbuffer, w

In Java, String, StringBuffer, and StringBuilder are often used as string classes in programming, and the difference between them is often the question they ask in an interview. Now to summarize, look at their differences and the same. 1. Variable and not variable The string class uses a character array to hold the strings, as follows, because there is a "final" modifier, so you know that the string object is immutable. Private final char value[];

("Hello");At this point the program, in addition to creating a string, str refers to the bottom of the string object also contains a char[] array, the char[] array is stored in turn h,e,l,l,oSecond, StringBufferJava provides a variable string class StringBuffer because the string changes cause the creation of new strings to be inefficient. StringBuffer inherits the Abstractstringbuilder class. Its default initialization operation is as follows: Public St