You can use built-in parse methods, Apache Commons Lang, and regular expressions, to check if a string is numeric in Java.
Java
String lastIndexOf() Method in Java
In Java, the lastIndexOf() of the String class retrieves the last occurrence (position) of the provided character or substring.
How to Split a String by Whitespaces in Java?
To split a string by whitespaces in Java, use the split() method on the provided string and specify the whitespace as a delimiter.
How to Find the Largest Element in an Array in Java?
To find and print the largest array element in Java, different methods like Arrays.sort(), Collections.max(), Java 8 Stream API, etc. are used.
Collections emptyList() Method in Java
In Java, the emptyList() is a built-in static method of the Collections class that doesn’t accept any parameter. It creates an empty and immutable List.
How to Use Modulo or Remainder Operator in Java
The modulo operator in Java performs division on given values and retrieves the remainder as output. It is denoted with a percent sign “%”.
How to Parse a String in Java?
To parse a string in Java, use the “parse()”, “split()”, or “useDelimiter()” method. Moreover, “StringUtils”, and the “StringTokenizer” Class are also used.
How to Import Math in Java?
To import the Math class in Java, use the “import static java.lang.Math.*;” statement at the start of your Java program.