ClassSupport (JUnit 5.4.2 API)

java.lang.Object
- org.junit.platform.commons.support.ClassSupport

```
@API(status=MAINTAINED,
     since="1.1")
public final class ClassSupport
extends Object
```
ClassSupport provides static utility methods for common tasks regarding classes — for example, generating a comma-separated list of fully qualified class names for a set of supplied classes.
TestEngine and extension authors are encouraged to use these supported methods in order to align with the behavior of the JUnit Platform.

Since:

1.1

See Also:

AnnotationSupport, ModifierSupport, ReflectionSupport

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static String`	`nullSafeToString(Class<?>... classes)`	Generate a comma-separated list of fully qualified class names for the supplied classes.
`static String`	`nullSafeToString(Function<? super Class<?>,? extends String> mapper, Class<?>... classes)`	Generate a comma-separated list of mapped values for the supplied classes.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - nullSafeToString
```
public static String nullSafeToString(Class<?>... classes)
```
    Generate a comma-separated list of fully qualified class names for the supplied classes.
    
    Parameters:
    
    classes - the classes whose names should be included in the generated string
    
    Returns:
    
    a comma-separated list of fully qualified class names, or an empty string if the supplied class array is null or empty
    
    See Also:
    
    nullSafeToString(Function, Class...)
  - nullSafeToString
```
public static String nullSafeToString(Function<? super Class<?>,? extends String> mapper,
                                      Class<?>... classes)
```
    Generate a comma-separated list of mapped values for the supplied classes.
    The values are generated by the supplied mapper (e.g., Class::getName, Class::getSimpleName, etc.), unless a class reference is null in which case it will be mapped to "null".
    
    Parameters:
    
    mapper - the mapper to use; never null
    
    classes - the classes to map
    
    Returns:
    
    a comma-separated list of mapped values, or an empty string if the supplied class array is null or empty
    
    See Also:
    
    nullSafeToString(Class...)