104: THE String CLASS in Java

Creation QR Code in Java 104: THE String CLASS
104: THE String CLASS
Generate QR-Code In Java
Using Barcode generator for Java Control to generate, create Denso QR Bar Code image in Java applications.
In Example 104, the frequencyData array at (1) stores the frequency of each character that can occur in a string The string in question is declared at (2) Since a char value is promoted to an int value in arithmetic expressions, it can be used as an index in an array Each element in the frequencyData array functions as a frequency counter for the character corresponding to the index value of the element:
Paint Barcode In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.
frequencyData[strcharAt(i)]++; // (4)
Scanning Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
The calls to the getChars() method at (5) and (6) copy particular substrings from the string into designated places in the destination array, before printing the whole character array We leave it as an exercise for the reader to implement a solution for character frequencies using a Map (see Section 158, p 821)
QR Code Drawer In C#
Using Barcode encoder for .NET framework Control to generate, create QR Code 2d barcode image in Visual Studio .NET applications.
Comparing Strings
Draw QR Code In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
Characters are compared based on their Unicode values
Quick Response Code Encoder In .NET
Using Barcode generator for .NET framework Control to generate, create QR-Code image in .NET framework applications.
boolean test = 'a' < 'b'; // true since 0x61 < 0x62
Painting QR Code JIS X 0510 In VB.NET
Using Barcode encoder for .NET framework Control to generate, create QR image in VS .NET applications.
Two strings are compared lexicographically, as in a dictionary or telephone directory, by successively comparing their corresponding characters at each position in the two strings, starting with the characters in the first position The string "abba" is less than "aha", since the second character 'b' in the string "abba" is less than the second character 'h' in the string "aha" The characters in the first position in each of these strings are equal See also The Comparator<E> Interface, p 771 The following public methods can be used for comparing strings:
Create UPC-A In Java
Using Barcode creation for Java Control to generate, create UCC - 12 image in Java applications.
boolean equals(Object obj) boolean equalsIgnoreCase(String str2)
Print Barcode In Java
Using Barcode creation for Java Control to generate, create bar code image in Java applications.
The String class overrides the equals() method from the Object class The String class equals() method implements String object value equality as two String objects having the same sequence of characters The equalsIgnoreCase() method does the same, but ignores the case of the characters
Paint Code 128 Code Set B In Java
Using Barcode generation for Java Control to generate, create Code128 image in Java applications.
int compareTo(String str2)
Barcode Creation In Java
Using Barcode generator for Java Control to generate, create barcode image in Java applications.
The String class implements the Comparable<String> interface The compareTo() method compares the two strings and returns a value based on the outcome of the comparison: the value 0, if this string is equal to the string argument a value less than 0, if this string is lexicographically less than the string argument a value greater than 0, if this string is lexicographically greater than the string argument
Encode EAN13 In Java
Using Barcode generator for Java Control to generate, create GTIN - 13 image in Java applications.
CHAPTER 10: FUNDAMENTAL CLASSES
Creating Delivery Point Barcode (DPBC) In Java
Using Barcode encoder for Java Control to generate, create USPS POSTNET Barcode image in Java applications.
Here are some examples of string comparisons:
Code 128C Drawer In Visual Studio .NET
Using Barcode generator for .NET framework Control to generate, create Code 128 Code Set A image in .NET applications.
String strA = new String("The Case was thrown out of Court"); String strB = new String("the case was thrown out of court"); boolean b1 = strAequals(strB); boolean b2 = strAequalsIgnoreCase(strB); String str1 = new String("abba"); String str2 = new String("aha"); int compVal1 = str1compareTo(str2); // negative value => str1 < str2 // false // true
Print Bar Code In VB.NET
Using Barcode printer for Visual Studio .NET Control to generate, create barcode image in .NET applications.
Character Case in a String
USS Code 128 Drawer In .NET
Using Barcode generator for ASP.NET Control to generate, create Code128 image in ASP.NET applications.
String toUpperCase() String toUpperCase(Locale locale) String toLowerCase() String toLowerCase(Locale locale)
Draw Barcode In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Note that the original string is returned if none of the characters need their case changed, but a new String object is returned if any of the characters need their case changed These methods delegate the character-by-character case conversion to corresponding methods from the Character class These methods use the rules of the (default) locale (returned by the method
Creating ECC200 In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix image in .NET framework applications.
LocalegetDefault()), which embodies the idiosyncrasies of a specific geo-
Barcode Generation In .NET
Using Barcode maker for ASP.NET Control to generate, create bar code image in ASP.NET applications.
graphical, political, or cultural region regarding number/date/currency formats, character classification, alphabet (including case idiosyncrasies), and other localizations (see Section 121, p 532) Example of case in strings:
Creating Bar Code In .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.
String strA = new String("The Case was thrown out of Court"); String strB = new String("the case was thrown out of court"); String strC = strAtoLowerCase(); String strD = strBtoLowerCase(); String strE = strAtoUpperCase(); boolean test1 = strC == strA; boolean test2 = strD == strB; boolean test3 = strE == strA; // // // // // Case conversion => New String object: "the case was thrown out of court" No case conversion => Same String object Case conversion => New String object: "THE CASE WAS THROWN OUT OF COURT"
// false // true // false
Concatenation of Strings
Concatenation of two strings results in a string that consists of the characters of the first string followed by the characters of the second string The overloaded operator + for string concatenation is discussed in Section 56 on page 180 In addition, the following method can be used to concatenate two strings:
String concat(String str)