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Strings are fixed-length collections of Unicode characters.
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Usually a string is created from a string literal or by using the constructor on an array of characters:
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String greeting = "Hello";
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or
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char[ ] bunch = {'H', 'e', 'l', 'l', 'o'};
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String greeting = new String( bunch );
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Once created, individual characters of a string cannot be changed in place. The following example uses String methods to create a new string:
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String test = "Chicken soup with rice";
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int n = test.indexOf( 'w' );
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String newtest = test.substring(1,n-1) + "is n" + test.substring(n+5);
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/* giving "Chicken soup is nice" */
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