xgboost4j_2.12 1.6.2 API < Back
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# Packages

-  package root
  Definition Classes
    root
-  package ml
  Definition Classes
    root
-  package dmlc
  Definition Classes
    ml
-  package xgboost4j
  Definition Classes
    dmlc
-  package java
  Definition Classes
    xgboost4j
-  package util
  Definition Classes
    java
- BigDenseMatrix
- UtilUnsafe

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ml.dmlc.xgboost4j.java

# util 

#### package util

### Type Members

1.  final class BigDenseMatrix extends AnyRef

   Off-heap implementation of a Dense Matrix, matrix size is only limited by the amount of the available memory and the matrix dimension cannot exceed Integer.MAX_VALUE (this is consistent with XGBoost API restrictions on maximum length of a response).

2.  final class UtilUnsafe extends AnyRef

   Simple class to obtain access to the `Unsafe` object.

   Simple class to obtain access to the `Unsafe` object. Use responsibly :)

### Ungrouped