/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

2 votes227 views1 answer
How to add a list in a list java
Java
0 vote246 views1 answer
Java standard exceptions
Java
2 votes184 views2 answers
Find Numbers with Even Number of Digits
Java
2 votes175 views2 answers
How to check null and empty string in java
Java
5 votes176 views6 answers
Datatables
Java
1 vote196 views1 answer
Find Minimum in Rotated Sorted Array
Java
1 vote194 views1 answer
Android highlight part of textview
Java
1 vote184 views6 answers
Roblox.com
Java
3 votes233 views1 answer
Jlabel text center
Java
1 vote168 views1 answer
Android save int
Java