## Uses of Class
ml.dmlc.xgboost4j.java.Booster

- Packages that use Booster
  Package | Description
  --- | ---
  ml.dmlc.xgboost4j.java |

- - ### Uses of Booster in ml.dmlc.xgboost4j.java

    Methods in ml.dmlc.xgboost4j.java that return Booster
    Modifier and Type | Method and Description
    --- | ---
    `Booster` | ExternalCheckpointManager.`loadCheckpointAsBooster()`
    `static Booster` | XGBoost.`loadModel(byte[] buffer)` Load a new Booster model from a byte array buffer.
    `static Booster` | XGBoost.`loadModel(InputStream in)` Load a new Booster model from a file opened as input stream.
    `static Booster` | XGBoost.`loadModel(String modelPath)` load model from modelPath
    `static Booster` | XGBoost.`train(DMatrix dtrain, Map<String,Object> params, int round, Map<String,DMatrix> watches, float[][] metrics, IObjective obj, IEvaluation eval, int earlyStoppingRound)` Train a booster given parameters.
    `static Booster` | XGBoost.`train(DMatrix dtrain, Map<String,Object> params, int round, Map<String,DMatrix> watches, float[][] metrics, IObjective obj, IEvaluation eval, int earlyStoppingRounds, Booster booster)` Train a booster given parameters.
    `static Booster` | XGBoost.`train(DMatrix dtrain, Map<String,Object> params, int round, Map<String,DMatrix> watches, IObjective obj, IEvaluation eval)` Train a booster given parameters.
    `static Booster` | XGBoost.`trainAndSaveCheckpoint(DMatrix dtrain, Map<String,Object> params, int numRounds, Map<String,DMatrix> watches, float[][] metrics, IObjective obj, IEvaluation eval, int earlyStoppingRounds, Booster booster, int checkpointInterval, String checkpointPath, org.apache.hadoop.fs.FileSystem fs)`

    Methods in ml.dmlc.xgboost4j.java with parameters of type Booster
    Modifier and Type | Method and Description
    --- | ---
    `static Booster` | XGBoost.`train(DMatrix dtrain, Map<String,Object> params, int round, Map<String,DMatrix> watches, float[][] metrics, IObjective obj, IEvaluation eval, int earlyStoppingRounds, Booster booster)` Train a booster given parameters.
    `static Booster` | XGBoost.`trainAndSaveCheckpoint(DMatrix dtrain, Map<String,Object> params, int numRounds, Map<String,DMatrix> watches, float[][] metrics, IObjective obj, IEvaluation eval, int earlyStoppingRounds, Booster booster, int checkpointInterval, String checkpointPath, org.apache.hadoop.fs.FileSystem fs)`
    `void` | ExternalCheckpointManager.`updateCheckpoint(Booster boosterToCheckpoint)`

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