Guava’s Table is a collection that represents a table like structure containing rows, columns and the associated cell values. The row and the column act as an ordered pair of keys.
The row and column act as an ordered pair of keys. If we have to manage this the traditional way then the structure would be a map of rows where each row contain a map of column and the cell values, for example, Map<rowKey, Map<colKey, cellValue>>.
Declaration : Following is the declaration for com.google.common.collect.Table<R, C, V> interface :
@GwtCompatible public interface Table<R, C, V>
- R : The type of the table row keys.
- C : The type of the table column keys.
- V : The type of the mapped values.
Some of methods provided by Table Interface are :
Guava provides different variety of implementations for Table interface, which are shown in below table :
Important Points :
- A table may be sparse, with only a small fraction of row key / column key pairs possessing a corresponding value.
- In some implementations, data access by column key may have fewer supported operations or worse performance than data access by row key.
- All methods that modify the table are optional, and the views returned by the table may or may not be modifiable. When modification isn’t supported, those methods will throw an UnsupportedOperationException.
Below given are some other methods provided by Table Interface :
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Reference : Google Guava
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