It removes the starting & ending spaces of the string Returns index of the rightmost occurrenceĬhecks if a string matches the regular expression Static String format(String format, Object… args)įor testing the string if it ends with suffix or not The class provides many useful methods to perform operations.īelow are some of the methods which are supported by the String class:Ĭhecks the equality of string with the given If we have a string with spaces at starting and ending, this method will help us remove those. String txt = "Please locate where 'locate' occurs!" It returns the index position of the 1 st occurrence of the specific text, which includes the white spaces as well. We can find the index of a given string in Java using the method “indexOf()”. To make an string uppercase & lowercase the string methods are: toUpperCase() and toLowerCase() ("The length of the txt string is: " + len) String txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" As an example, with the help of the method “length()”, we can find the length of a string. The Java String is basically an object, which used to have methods that perform some operations on the strings. Let us see the methods in the String Class. Using these two utility classes, it becomes easier to manipulate the java string. And since string manipulation consumes resource, java provides two utility classes: StringBuffer and StringBuilder. As the Java String is immutable and fixed, we need to create a new string whenever we need to do string manipulation. Java String class implements three interfaces, namely – Serializable, Comparable and CharSequence. For example: String s=new String("Hello") Using a new keyword: Java String can also be created by using the keyword “new”. Using string literal: Java String literal can be created by using double quotes. Thus, we can directly assign a string into a String variable instead of calling the constructor to create a String instance.ġ. The string is associated with a string literal in the form of double-quoted texts such as “Hello, world!”. An operator in java is also like a symbol that is used to perform operations. They take inputs as operands and return some value as an output. An operator is usually a symbol that asks the compiler to perform specific mathematical or logical manipulations. Java String is one of the most widely used classes and is defined in java.lang package. In Java, strings are treated as objects, and the Java platform provides the String class to create and manipulate such strings. A string is usually a sequence of characters, either as a literal constant or some kind of variable. The following article, Java String Operators, provides an outline of the operators and methods used in Java String.
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