Creating Strings and String Buffers in Java

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A string is often created from a string literal a series of characters enclosed in double quotes For example, when it encounters the following string literal, the Java platform creates a String object whose value is Gobbledygook
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"Gobbledygook"
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TheStringsDemo program uses this technique to create the string referred to by the palindrome variable:
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String palindrome = "Dot saw I was Tod";
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You can also create String objects as you would any other Java object: using the new keyword and a constructor The String class provides several constructors that allow you to provide the initial value of the string, using different sources, such as an array of characters, an array of bytes, or a string bufferTable 24 shows the constructors provided by the String class Table of Contents
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Java Tutorial, Third Edition: A Short Course on the Basics, The
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ByMary Campione,Kathy Walrath,Alison Huml Publisher Pub Date ISBN Pages : Addison Wesley
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Table 24 Constructors in the String Class [a] Description Creates an empty string
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Constructor : December 28, 2000
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: 592
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String() : 0-201-70393-9
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Creates a string whose value is set from the contents of an array of bytes The two integer arguments, when present, set the offset and the length, respectively, of the subarray from which to take the initial values The String itargument, available on the web and read by thousands of has been when present, specifies the character encoding Java programmers The authors have received an to convert amount of feedback about which sections to use enormous bytes to characters are good and which sections are confusing; the confusing ones have been improved I doubt that any Creates a string whose value is set from the contents of an other Java book has undergone such trial by fire" -Metroplex Java User Group, String(char[]) array of characters The two integer arguments, when wwwjavamugorg/reviews/ String(char[], int, int) present, set the offset and the length, respectively, of the subarray The which to take the initial values Whether you're taking a class or learning on the job, fromJava(TM) Tutorial, Third Edition , is a hands-
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String(byte[]) String(byte[], int, int) String(byte[], int, int, String) String(byte[], String) "This book stands above the rest because
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Creates a the Java programming language Written by on guide that lets you quickly become proficient with string whose value is set from another string String(String) members of the Java Software team at SunUsing this constructor with a literal string argument is not Microsystems, the book uses an interactive approach to recommended, because it creates two identical strings help you learn the Java platform by example Creates a string whose value is set from a string buffer String(StringBuffer) Since its first online release in 1995, the material in The Java(TM) Tutorial has been updated continuously to reflect reader feedback and new releases of the Java platform This third edition has [a] The String class defines other constructors not listed in this Edition, as constructors have been thoroughly updated to cover v13 of the Java Platform, Standardtable Thosewell as preceding been early as JDK 11 versions as deprecated, and their use is not recommended Here's an example of creating a string from a character array: classes, and data structures In You will find clear explanations of such fundamentals as objects, addition, the book provides introductions to object-oriented programming, applet construction, and user interface design = { topics include exceptions, I/O, and char[] helloArray Other 'h', 'e', 'l', 'l', 'o' }; threads To help beginners avoid many common mistakes, an String(helloArray); helloString = new entire chapter is devoted to programming problems and their solutions Convenient summaries at the end of each Systemoutprintln(helloString); section are new to this edition Also new for this edition are "Questions and Exercises" sections to help you practice what you learn The last line of this code snippet displays: hello After working through the lessons in this proven tutorial, you will be well prepared to use the Java programming language in your school or workplace You must always use new to create a string buffer The StringBuffer class has three constructors, as described in Table 25
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Table 25 Constructors in the StringBuffer Class Constructor Description Creates an empty string buffer whose initial capacity is 16 characters Creates an empty string buffer with the specified initial capacity Creates a string buffer whose value is initialized by the specified String The capacity of the string buffer is the length of the original string plus 16
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StringBuffer() StringBuffer(int) StringBuffer(String)
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TheStringsDemo program creates the string buffer referred to by dest, using the constructor that sets the buffer's capacity:
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Table of Contents String palindrome = "Dot saw I was Tod"; int len = palindromelength(); Java Tutorial, Third Edition: A Short StringBuffer dest = new StringBuffer(len);
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