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Java - get first character from string
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In this article, we would like to show you how to get the first character of a string in Java.
Quick solution:
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String text = "ABC";2
String firstCharacter = text.substring(0, 1);3
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System.out.println( firstCharacter ); // A
The below example shows how to use substring() method to get the first character of the text string.
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public class Example {2
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static String getFirstCharacters(String text, int numberCount) {4
if (text.length() == numberCount) {5
return text;6
} else if (text.length() > numberCount) {7
return text.substring(0, numberCount);8
} else {9
throw new IllegalArgumentException("Your text is shorter than " + numberCount + " character(s)!");10
}11
}12
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public static void main(String[] args) {14
System.out.println( getFirstCharacters( "123", 1) ); // 115
System.out.println( getFirstCharacters( "12", 1) ); // 116
System.out.println( getFirstCharacters( "1", 1) ); // 117
System.out.println( getFirstCharacters( "", 1) ); // IllegalArgumentException18
}19
}Output:
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12
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Exception in thread "main" java.lang.IllegalArgumentException: Your text is shorter than 1 character(s)!