string Archives - Page 77 of 78

Difference between String replace() and replaceAll()

In java.lang.String, the replace method either takes a pair of char’s or a pair of CharSequence‘s (of which String is a subclass, so it’ll happily take a ...

April 4, 2022
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Java String to SHA1

UPDATEYou can use Apache Commons Codec (version 1.7+) to do this job for you. DigestUtils.sha1Hex(stringToConvertToSHexRepresentation) Thanks to @Jon Onstott for this suggestion. Old Convert your Byte ...

April 4, 2022
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Replace a character at a specific index in a string?

String are immutable in Java. You can’t change them. You need to create a new string with the character replaced. String myName = ...

April 4, 2022
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Determine if a String is an Integer in Java [duplicate]

The most naive way would be to iterate over the String and make sure all the elements are valid digits for the given ...

April 3, 2022
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How to convert a String to CharSequence?

Since String IS-A CharSequence, you can pass a String wherever you need a CharSequence, or assign a String to a CharSequence: CharSequence cs = "string"; String s = cs.toString(); foo(s); // prints ...

April 3, 2022
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How do I convert a String to a BigInteger?

April 3, 2022
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How can I remove a substring from a given String?

April 3, 2022
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Java get String CompareTo as a comparator object

The Arrays class has versions of sort() and binarySearch() which don’t require a Comparator. For example, you can use the version of Arrays.sort() ...

April 3, 2022
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How to use regex in String.contains() method in Java

String.contains String.contains works with String, period. It doesn’t work with regex. It will check whether the exact String specified appear in the current ...

April 3, 2022
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How to swap String characters in Java?

Since String objects are immutable, going to a char via toCharArray, swapping the characters, then making a new String from char via the String(char...

April 3, 2022
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