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Simple way to repeat a string

". ".repeat(7) // Seven period-with-space pairs: . . . . . . . New in Java 11 is the method String::repeat that does ...

April 4, 2022
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Java end of file

import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String...

April 4, 2022
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Unclosed Character Literal error

In Java, single quotes can only take one character, with escape if necessary. You need to use full quotation marks as follows for ...

April 4, 2022
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Java: how to initialize String[]?

You need to initialize errorSoon, as indicated by the error message, you have only declared it. String errorSoon; // <--declared statement String errorSoon = new String[100]; // ...

April 4, 2022
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Regular Expressions on Punctuation

Regular Expressions on Punctuation

April 4, 2022
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Add String Array to ArrayList

Add String Array to ArrayList

April 4, 2022
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StringIndexOutOfBoundsException String index out of range: 0

StringIndexOutOfBoundsException String index out of range: 0

April 4, 2022
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How to extract a substring using regex

Assuming you want the part between single quotes, use this regular expression with a Matcher: Example: String mydata = "some string with 'the data ...

April 4, 2022
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difference between equals() and hashCode()

difference between equals() and hashCode()

April 4, 2022
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How can I check if a single character appears in a string?

How can I check if a single character appears in a string?

April 4, 2022
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