public
static TimeUnit valueOf(String name)
Returns
the enum constant of this type with the specified name. The string
must match exactly an identifier used to declare an enum constant in
this type.
Example
import java.util.concurrent.TimeUnit; public class TimeUnitEx { public static void main(String args[]){ TimeUnit Days = TimeUnit.valueOf("DAYS"); System.out.println(Days); System.out.println(Days.toHours(1)); } }
Output
DAYS
24
Some
Points to Remember
1.
If the argument to the valuesOf is null, then NullPointerException
thrown.
import java.util.concurrent.TimeUnit; public class TimeUnitEx { public static void main(String args[]){ TimeUnit Days = TimeUnit.valueOf(null); } }
When
you tries to run the above program, Java run time throws the
NullPointerException.
Exception in thread "main" java.lang.NullPointerException: Name is null at java.lang.Enum.valueOf(Enum.java:235) at java.util.concurrent.TimeUnit.valueOf(TimeUnit.java:71) at TimeUnitEx.main(TimeUnitEx.java:14) Java Result: 1
2.
If the string passed to valueOf is not match with the TimeUnit
constants, then IllegalArgumentException thrown.
import java.util.concurrent.TimeUnit; public class TimeUnitEx { public static void main(String args[]){ TimeUnit Days = TimeUnit.valueOf("ABCD"); } }
When
you tries to run the above program, Java run time throws
IllegalArgumentException
Exception in thread "main" java.lang.IllegalArgumentException: No enum constant java.util.concurrent.TimeUnit.ABCD at java.lang.Enum.valueOf(Enum.java:236) at java.util.concurrent.TimeUnit.valueOf(TimeUnit.java:71) at TimeUnitEx.main(TimeUnitEx.java:14) Java Result: 1
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