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Java substring code#

ignoreCase is false and there is some nonnegative.

Other to be compared begins at index ooffset and This String object to be compared begins at index Substrings represent character sequences that are the same, ignoringĬase if and only if ignoreCase is true.

regionMatches public boolean regionMatches(boolean ignoreCase,.

Returns: true if the specified subregion of this stringĮxactly matches the specified subregion of the string argument len - the number of characters to compare. ooffset - the starting offset of the subregion in the stringĪrgument. This.charAt(toffset+ k) != other.charAt(ooffset+ k) Parameters: toffset - the starting offset of the subregion in this string.

There is some nonnegative integer k less than len.

ooffset+len is greater than the length of the other.

toffset+len is greater than the length of this.

Result is false if and only if at least one of the following The substring of other to be comparedīegins at index ooffset and has length len. String object to be compared begins at index toffsetĪnd has length len.

compareToIgnoreCase public int compareToIgnoreCase( String str)Ī substring of this String object is compared to a substring.

Lexicographically greater than the string argument. Is lexicographically less than the string argument and a

This string a value less than 0 if this string Returns: the value 0 if the argument string is equal to Whose character at position k has the smaller value, asĭetermined by using the Parameters: anotherString - the String to be compared. Positions, let k be the smallest such index then the string If they have different characters at one or more index That is a valid index for both strings, or their lengths are different, If two strings areĭifferent, then either they have different characters at some index This is the definition of lexicographic ordering. The equals(Object) method would return true. The result is zero if the stringsĪre equal compareTo returns 0 exactly when Positive integer if this String object lexicographicallyįollows the argument string. Lexicographically precedes the argument string. String object is compared lexicographically to theĬharacter sequence represented by the argument string. The character sequence represented by this The comparison is based on the Unicode value of each character in

getBytes public byte getBytes( String charsetName).

dstBegin+(srcEnd-srcBegin) is larger than dst.length.

srcEnd is greater than the length of this String.

Parameters: srcBegin - Index of the first character in the string to copy srcEnd - Index after the last character in the string to copy dst - The destination array dstBegin - The start offset in the destination array Throws: IndexOutOfBoundsException - If any of the following is true: TheĬharacters, converted to bytes, are copied into the subarray of dst starting at index dstBegin and ending at index: Number of characters to be copied is srcEnd-srcBegin. Last character to be copied is at index srcEnd-1. The first character to be copied is at index srcBegin the TheĮight high-order bits of each character are not copied and do not Eachīyte receives the 8 low-order bits of the corresponding character. Since: JDK1.0 See Also: Object.toString(),Ĭopies characters from this string into the destination byte array.

Java substring code#

Unicode code points (i.e., characters), in addition to those forĭealing with Unicode code units (i.e., char values). The String class provides methods for dealing with Index values refer to char code units, so a supplementaryĬharacter uses two positions in a String. In which supplementary characters are represented by surrogateĬharacter Representations in the Character class for Or method in this class will cause a NullPointerException to beĪ String represents a string in the UTF-16 format Unless otherwise noted, passing a null argument to a constructor String concatenation and conversion, see Gosling, Joy, and Steele, String conversions are implemented through the method Through the StringBuilder(or StringBuffer) The Java language provides special support for the stringĬoncatenation operator ( + ), and for conversion of Case mapping is based on the Unicode Standard version

Searching strings, for extracting substrings, and for creating aĬopy of a string with all characters translated to uppercase or to

Individual characters of the sequence, for comparing strings, for The class String includes methods for examining Here are some more examples of how strings can be used: String buffers support mutable strings.īecause String objects are immutable they can be shared. Strings are constant their values cannot be changed after theyĪre created. String literals in Java programs, such as "abc", are The String class represents character strings.