/Java/Check whether a double is not a number in java

Check whether a double is not a number in java

double delta = -3;
double val = Math.sqrt(delta);
System.out.println(Double.isNaN(val)); // true

How to check if string is double or not in java

String decimalPattern = "([0-9]*)\\.([0-9]*)";  
String number="20.00";  
boolean match = Pattern.matches(decimalPattern, number);
System.out.println(match); //if true then decimal else not

Source: stackoverflow.com

Similar codes

-1 vote103 views2 answers
Spring boot fix cors problem
Java
0 vote104 views1 answer
Arraylistof objects
Java
0 vote103 views1 answer
How to read file from console in java
Java
0 vote60 views1 answer
What is final class
Java
13 votes132 views6 answers
Android java parse date time
Java
2 votes114 views2 answers
Cls java
Java
3 votes104 views1 answer
How to get witdth of window android
Java
0 vote107 views1 answer
How to read a date string in java
Java
0 vote105 views1 answer
Javafx how to put multiple handlers in the same line
Java
0 vote117 views1 answer
String vs new string
Java