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
- Booster
- Column
- ColumnBatch
- DMatrix
- DeviceQuantileDMatrix
- ExternalCheckpointManager
- IEvaluation
- IObjective
- IRabitTracker
- Rabit
- RabitTracker
- TrackerProperties
- XGBoost
- XGBoostError

c

ml.dmlc.xgboost4j.java

# Column 

###

#### abstract class Column extends AutoCloseable

The abstracted XGBoost Column to get the cuda array interface which is used to set the information for DMatrix.

Linear Supertypes
AutoCloseable, AnyRef, Any
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1. Column
2. AutoCloseable
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### Instance Constructors

1.  new Column()

### Abstract Value Members

1.  abstract def getArrayInterfaceJson(): String

   Get the cuda array interface json string for the Column which can be representing weight, label, base margin column.

   Get the cuda array interface json string for the Column which can be representing weight, label, base margin column.

   This API will be called by `DMatrix#setLabel(Column)` `DMatrix#setWeight(Column)` `DMatrix#setBaseMargin(Column)`

### Concrete Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##(): Int
   Definition Classes
     AnyRef → Any
3.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
4.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
5.  def clone(): AnyRef
   Attributes
     protected[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @native() @throws( ... )
6.  def close(): Unit
   Definition Classes
     Column → AutoCloseable
7.  final def eq(arg0: AnyRef): Boolean
   Definition Classes
     AnyRef
8.  def equals(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
9.  def finalize(): Unit
   Attributes
     protected[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( classOf[java.lang.Throwable] )
10.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
11.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
12.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
13.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
14.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
15.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
16.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
17.  def toString(): String
    Definition Classes
      AnyRef → Any
18.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
19.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
20.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @native() @throws( ... )

### Inherited from AutoCloseable

### Inherited from AnyRef

### Inherited from Any

### Ungrouped