Java Module java.base Package java.util Class UnknownFormatFlagsException（JDK11）

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java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - java.lang.RuntimeException
    - - java.lang.IllegalArgumentException
      - java.util.IllegalFormatException
        
        java.util.UnknownFormatFlagsException

All Implemented Interfaces:

Serializable
```
public class UnknownFormatFlagsException
extends IllegalFormatException
```
Unchecked exception thrown when an unknown flag is given.
Unless otherwise specified, passing a null argument to any method or constructor in this class will cause a NullPointerException to be thrown.

Since:

1.5

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`UnknownFormatFlagsException(String f)`	Constructs an instance of this class with the specified flags.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getFlags()`	Returns the set of flags which contains an unknown flag.

Methods declared in class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - UnknownFormatFlagsException
```
public UnknownFormatFlagsException(String f)
```
    Constructs an instance of this class with the specified flags.
    
    Parameters:
    
    f - The set of format flags which contain an unknown flag
- Method Detail
  - getFlags
```
public String getFlags()
```
    Returns the set of flags which contains an unknown flag.
    
    Returns:
    
    The flags

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