ColumnType (tablesaw-core 0.44.4 API)

All Known Implementing Classes:

AbstractColumnType, BooleanColumnType, DateColumnType, DateTimeColumnType, DoubleColumnType, FloatColumnType, InstantColumnType, IntColumnType, LongColumnType, ShortColumnType, SkipColumnType, StringColumnType, TimeColumnType
```
public interface ColumnType
```
Specifies the type of data held by a column and a small number of methods specialized for each type

Field Summary

Fields
Modifier and Type	Field	Description
`static BooleanColumnType`	`BOOLEAN`
`static DoubleColumnType`	`DOUBLE`
`static FloatColumnType`	`FLOAT`
`static InstantColumnType`	`INSTANT`
`static IntColumnType`	`INTEGER`
`static DateColumnType`	`LOCAL_DATE`
`static DateTimeColumnType`	`LOCAL_DATE_TIME`
`static TimeColumnType`	`LOCAL_TIME`
`static LongColumnType`	`LONG`
`static ShortColumnType`	`SHORT`
`static SkipColumnType`	`SKIP`
`static StringColumnType`	`STRING`
`static Map<String,ColumnType>`	`values`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`int`	`byteSize()`	Returns the size in bytes of a single element held in columns of this type
`default boolean`	`compare(int col1Row, Column<?> col1, int col2Row, Column<?> col2)`	Returns true if the value at the specified index in column1 is equal to the value at the specified index in column 2
`Column<?>`	`create(String name)`	Returns a column of this type with the given name
`AbstractColumnParser<?>`	`customParser(ReadOptions options)`	TODO: Research this method to provide a good comment
`String`	`getPrinterFriendlyName()`	Returns a printer-friendly version of this ColumnType's name
`String`	`name()`	Returns the name of this ColumnType
`static void`	`register(ColumnType type)`	Registers the given ColumnType, identifying it as supported
`static ColumnType`	`valueOf(String name)`	Returns the columnType named by the argument
`static ColumnType[]`	`values()`	Returns an array containing all supported ColumnTypes

Field Detail

values

static final Map<String,ColumnType> values

SHORT
```
static final ShortColumnType SHORT
```

INTEGER
```
static final IntColumnType INTEGER
```

LONG
```
static final LongColumnType LONG
```

FLOAT
```
static final FloatColumnType FLOAT
```

BOOLEAN
```
static final BooleanColumnType BOOLEAN
```

STRING
```
static final StringColumnType STRING
```

DOUBLE
```
static final DoubleColumnType DOUBLE
```

LOCAL_DATE
```
static final DateColumnType LOCAL_DATE
```

LOCAL_TIME
```
static final TimeColumnType LOCAL_TIME
```

LOCAL_DATE_TIME

static final DateTimeColumnType LOCAL_DATE_TIME

INSTANT
```
static final InstantColumnType INSTANT
```

SKIP
```
static final SkipColumnType SKIP
```

Method Detail
- register
```
static void register(ColumnType type)
```
  Registers the given ColumnType, identifying it as supported
- values
```
static ColumnType[] values()
```
  Returns an array containing all supported ColumnTypes
- valueOf
```
static ColumnType valueOf(String name)
```
  Returns the columnType named by the argument
  
  Parameters:
  
  name - a valid column type name
  
  Returns:
  
  the ColumnType with that name
- create
```
Column<?> create(String name)
```
  Returns a column of this type with the given name
- name
```
String name()
```
  Returns the name of this ColumnType
- byteSize
```
int byteSize()
```
  Returns the size in bytes of a single element held in columns of this type
- getPrinterFriendlyName
```
String getPrinterFriendlyName()
```
  Returns a printer-friendly version of this ColumnType's name
- customParser
```
AbstractColumnParser<?> customParser(ReadOptions options)
```
  TODO: Research this method to provide a good comment
- compare
```
default boolean compare(int col1Row,
                        Column<?> col1,
                        int col2Row,
                        Column<?> col2)
```
  Returns true if the value at the specified index in column1 is equal to the value at the specified index in column 2