/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

0 vote132 views3 answers
Java to python converter online
Java
0 vote133 views1 answer
Adding entity to calenderfx
Java
0 vote145 views1 answer
Java stringbuilder setcharat
Java
-1 vote147 views1 answer
Directory size java
Java
7 votes106 views2 answers
Arraylist to string
Java
0 vote134 views1 answer
Java stream sort Collator
Java
2 votes134 views1 answer
Javafx stackpane set position
Java
0 vote130 views1 answer
Force_dark_auto android webview
Java
0 vote147 views1 answer
Java.lang.IllegalStateException: Not scheduled yet
Java
0 vote142 views1 answer
How to style Bottom Sheet
Java