Util (ff4j-core 1.3.3 API)

java.lang.Object
- org.ff4j.utils.Util

```
public abstract class Util
extends Object
```
Tips and tricks to be less verbose.

Author:

Cedrick LUNVEN

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`assertHasLength(String text)` Check that string is not null
`static void`	`assertNotEmpty(Collection<?> collec)` Check that string is not null
`static void`	`assertNotNull(Object object)` Check that object is not null.
`static void`	`assertNull(Object object)` Check that object is null.
`static void`	`assertParamNotNull(String param, String paramName)` Parameter validation.
`static void`	`assertTrue(boolean expression)` Check that expression is true.
`static List<String>`	`getColorsGradient(int nbsectors)` Dedicated gradient for ff4j console (Pie Chart).
`static <T> Set<T>`	`set(T... els)` Create an HashSet.

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

- Method Detail
  - assertTrue
```
public static void assertTrue(boolean expression)
```
    Check that expression is true.
    
    Parameters:
    
    expression - expression to evaluate
  - assertNull
```
public static void assertNull(Object object)
```
    Check that object is null.
    
    Parameters:
    
    object - target object
  - assertNotNull
```
public static void assertNotNull(Object object)
```
    Check that object is not null.
    
    Parameters:
    
    object - target object
  - assertHasLength
```
public static void assertHasLength(String text)
```
    Check that string is not null
    
    Parameters:
    
    object - target object
  - assertNotEmpty
```
public static void assertNotEmpty(Collection<?> collec)
```
    Check that string is not null
    
    Parameters:
    
    object - target object
  - assertParamNotNull
```
public static void assertParamNotNull(String param,
                                      String paramName)
```
    Parameter validation.
    
    Parameters:
    
    param - current parameter
    
    paramName - current parameter name
  - set
```
public static <T> Set<T> set(T... els)
```
    Create an HashSet.
    
    Parameters:
    
    els - enumeration of elements
    
    Returns:
  - getColorsGradient
```
public static List<String> getColorsGradient(int nbsectors)
```
    Dedicated gradient for ff4j console (Pie Chart).
    
    Parameters:
    
    nbsectors - target sectors
    
    Returns:
    
    color gradient

Class Util

Method Summary

Methods inherited from class java.lang.Object

Method Detail

assertTrue

assertNull

assertNotNull

assertHasLength

assertNotEmpty

assertParamNotNull

set

getColorsGradient