io.qt.core.QVariant

public final class QVariant
extends Object

The QVariant class contains a set of static methods to convert between datatypes.

You can check with this class whether a datatype can be converted to another. This is datatypes which cannot simply be cast to each other, but requires processing to convert, i.e., you cannot use the instanceof operator as you would for classes with the same super class.

Nested Class Summary

Nested Classes

Modifier and Type Class Description

static class QVariant.Type
Deprecated.

Method Summary

Modifier and Type	Method	Description
`static boolean`	`canConvert(Object obj, int targetType)`
`static boolean`	`canConvert(Object obj, QMetaType type)`
`static boolean`	`canConvert(Object obj, QMetaType.Type type)`
`static boolean`	`canConvert(Object obj, QVariant.Type type)`	Deprecated.
`static boolean`	`canConvertToBitArray(Object obj)`
`static boolean`	`canConvertToBoolean(Object obj)`
`static boolean`	`canConvertToByteArray(Object obj)`
`static boolean`	`canConvertToChar(Object obj)`
`static boolean`	`canConvertToCollection(Object obj)`
`static boolean`	`canConvertToDate(Object obj)`
`static boolean`	`canConvertToDateTime(Object obj)`
`static boolean`	`canConvertToDouble(Object obj)`
`static <E extends Enum<?>> boolean`	`canConvertToEnum(Class<E> enumClass, Object obj)`
`static boolean`	`canConvertToFlags(Object obj)`
`static boolean`	`canConvertToFloat(Object obj)`
`static boolean`	`canConvertToInt(Object obj)`
`static boolean`	`canConvertToLine(Object obj)`
`static boolean`	`canConvertToLineF(Object obj)`
`static boolean`	`canConvertToList(Object obj)`
`static boolean`	`canConvertToLocale(Object obj)`
`static boolean`	`canConvertToLong(Object obj)`
`static boolean`	`canConvertToMap(Object obj)`
`static boolean`	`canConvertToPoint(Object obj)`
`static boolean`	`canConvertToPointF(Object obj)`
`static boolean`	`canConvertToRect(Object obj)`
`static boolean`	`canConvertToRectF(Object obj)`
`static boolean`	`canConvertToRegularExpression(Object obj)`
`static boolean`	`canConvertToSize(Object obj)`
`static boolean`	`canConvertToSizeF(Object obj)`
`static boolean`	`canConvertToString(Object obj)`
`static boolean`	`canConvertToStringList(Object obj)`
`static boolean`	`canConvertToTime(Object obj)`
`static Object`	`convert(Object obj, int userType)`
`static Object`	`convert(Object obj, QMetaType userType)`
`static Object`	`convert(Object obj, QMetaType.Type type)`
`static Object`	`convert(Object obj, QMetaType.Type type, boolean[] ok)`
`static Object`	`convert(Object obj, QVariant.Type type)`	Deprecated.
`static Object`	`convert(Object obj, QVariant.Type type, boolean[] ok)`	Deprecated.
`static <T> T`	`convert(Object value, Class<T> cl)`
`static Object`	`loadObject(QDataStream stream)`
`static Object`	`loadObject(QDataStream stream, Boolean[] ok)`
`static void`	`saveObject(QDataStream stream, Object variant)`
`static void`	`saveObject(QDataStream stream, Object variant, Boolean[] ok)`
`static QBitArray`	`toBitArray(Object obj)`
`static boolean`	`toBoolean(Object obj)`
`static QByteArray`	`toByteArray(Object obj)`
`static char`	`toChar(Object obj)`
`static Collection<?>`	`toCollection(Object obj)`
`static QDate`	`toDate(Object obj)`
`static QDateTime`	`toDateTime(Object obj)`
`static double`	`toDouble(Object obj)`
`static double`	`toDouble(Object obj, boolean[] ok)`
`static <E extends Enum<?>> E`	`toEnum(Class<E> enumClass, Object obj)`
`static <E extends Enum<?>> E`	`toEnum(Class<E> enumClass, Object obj, boolean[] ok)`
`static <F extends QFlags<?>> F`	`toFlags(Class<F> flagsClass, Object obj)`
`static <F extends QFlags<?>> F`	`toFlags(Class<F> flagsClass, Object obj, boolean[] ok)`
`static float`	`toFloat(Object obj)`
`static float`	`toFloat(Object obj, boolean[] ok)`
`static QHash<String,Object>`	`toHash(Object obj)`
`static int`	`toInt(Object obj)`
`static int`	`toInt(Object obj, boolean[] ok)`
`static QLine`	`toLine(Object obj)`
`static QLineF`	`toLineF(Object obj)`
`static QList<Object>`	`toList(Object obj)`
`static QLocale`	`toLocale(Object obj)`
`static long`	`toLong(Object obj)`
`static long`	`toLong(Object obj, boolean[] ok)`
`static QMap<String,Object>`	`toMap(Object obj)`
`static QPoint`	`toPoint(Object obj)`
`static QPointF`	`toPointF(Object obj)`
`static QRect`	`toRect(Object obj)`
`static QRectF`	`toRectF(Object obj)`
`static QRegularExpression`	`toRegularExpression(Object obj)`
`static QSize`	`toSize(Object obj)`
`static QSizeF`	`toSizeF(Object obj)`
`static String`	`toString(Object obj)`
`static QStringList`	`toStringList(Object obj)`
`static QTime`	`toTime(Object obj)`
`static int`	`type(Object obj)`

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- convert
  
  public static Object convert(Object obj, QMetaType.Type type)
- convert
  
  public static Object convert(Object obj, QMetaType.Type type, boolean[] ok)
- convert
  
  @Deprecated public static Object convert(Object obj, QVariant.Type type)
  
  Deprecated.
- convert
  
  @Deprecated public static Object convert(Object obj, QVariant.Type type, boolean[] ok)
  
  Deprecated.
- convert
  
  public static Object convert(Object obj, int userType)
- convert
  
  public static Object convert(Object obj, QMetaType userType)
- canConvert
  
  public static boolean canConvert(Object obj, QMetaType type)
- canConvert
  
  public static boolean canConvert(Object obj, QMetaType.Type type)
- canConvert
  
  @Deprecated public static boolean canConvert(Object obj, QVariant.Type type)
  
  Deprecated.
- canConvert
  
  public static boolean canConvert(Object obj, int targetType)
- type
  
  public static int type(Object obj)
- canConvertToDouble
  
  public static boolean canConvertToDouble(Object obj)
- toDouble
  
  public static double toDouble(Object obj)
- toDouble
  
  public static double toDouble(Object obj, boolean[] ok)
- canConvertToFloat
  
  public static boolean canConvertToFloat(Object obj)
- toFloat
  
  public static float toFloat(Object obj)
- toFloat
  
  public static float toFloat(Object obj, boolean[] ok)
- canConvertToString
  
  public static boolean canConvertToString(Object obj)
- toString
  
  public static String toString(Object obj)
- canConvertToBoolean
  
  public static boolean canConvertToBoolean(Object obj)
- toBoolean
  
  public static boolean toBoolean(Object obj)
- canConvertToByteArray
  
  public static boolean canConvertToByteArray(Object obj)
- toByteArray
  
  public static QByteArray toByteArray(Object obj)
- canConvertToBitArray
  
  public static boolean canConvertToBitArray(Object obj)
- toBitArray
  
  public static QBitArray toBitArray(Object obj)
- canConvertToChar
  
  public static boolean canConvertToChar(Object obj)
- toChar
  
  public static char toChar(Object obj)
- canConvertToDate
  
  public static boolean canConvertToDate(Object obj)
- toDate
  
  public static QDate toDate(Object obj)
- canConvertToDateTime
  
  public static boolean canConvertToDateTime(Object obj)
- toDateTime
  
  public static QDateTime toDateTime(Object obj)
- canConvertToInt
  
  public static boolean canConvertToInt(Object obj)
- toInt
  
  public static int toInt(Object obj)
- toInt
  
  public static int toInt(Object obj, boolean[] ok)
- canConvertToLine
  
  public static boolean canConvertToLine(Object obj)
- toLine
  
  public static QLine toLine(Object obj)
- canConvertToLineF
  
  public static boolean canConvertToLineF(Object obj)
- toLineF
  
  public static QLineF toLineF(Object obj)
- canConvertToLocale
  
  public static boolean canConvertToLocale(Object obj)
- toLocale
  
  public static QLocale toLocale(Object obj)
- canConvertToPoint
  
  public static boolean canConvertToPoint(Object obj)
- toPoint
  
  public static QPoint toPoint(Object obj)
- canConvertToPointF
  
  public static boolean canConvertToPointF(Object obj)
- toPointF
  
  public static QPointF toPointF(Object obj)
- canConvertToRect
  
  public static boolean canConvertToRect(Object obj)
- toRect
  
  public static QRect toRect(Object obj)
- canConvertToRectF
  
  public static boolean canConvertToRectF(Object obj)
- toRectF
  
  public static QRectF toRectF(Object obj)
- canConvertToRegularExpression
  
  public static boolean canConvertToRegularExpression(Object obj)
- toRegularExpression
  
  public static QRegularExpression toRegularExpression(Object obj)
- canConvertToSize
  
  public static boolean canConvertToSize(Object obj)
- toSize
  
  public static QSize toSize(Object obj)
- canConvertToSizeF
  
  public static boolean canConvertToSizeF(Object obj)
- toSizeF
  
  public static QSizeF toSizeF(Object obj)
- canConvertToTime
  
  public static boolean canConvertToTime(Object obj)
- toTime
  
  public static QTime toTime(Object obj)
- canConvertToLong
  
  public static boolean canConvertToLong(Object obj)
- toLong
  
  public static long toLong(Object obj)
- toLong
  
  public static long toLong(Object obj, boolean[] ok)
- canConvertToList
  
  public static boolean canConvertToList(Object obj)
- toList
  
  public static QList<Object> toList(Object obj)
- canConvertToStringList
  
  public static boolean canConvertToStringList(Object obj)
- toStringList
  
  public static QStringList toStringList(Object obj)
- canConvertToCollection
  
  public static boolean canConvertToCollection(Object obj)
- toCollection
  
  public static Collection<?> toCollection(Object obj)
- canConvertToMap
  
  public static boolean canConvertToMap(Object obj)
- toHash
  
  public static QHash<String,Object> toHash(Object obj)
- toMap
  
  public static QMap<String,Object> toMap(Object obj)
- convert
  
  public static <T> T convert(Object value, Class<T> cl)
- canConvertToEnum
  
  public static <E extends Enum<?>> boolean canConvertToEnum(Class<E> enumClass, Object obj)
- canConvertToFlags
  
  public static boolean canConvertToFlags(Object obj)
- toEnum
  
  public static <E extends Enum<?>> E toEnum(Class<E> enumClass, Object obj)
- toEnum
  
  public static <E extends Enum<?>> E toEnum(Class<E> enumClass, Object obj, boolean[] ok)
- toFlags
  
  public static <F extends QFlags<?>> F toFlags(Class<F> flagsClass, Object obj)
- toFlags
  
  public static <F extends QFlags<?>> F toFlags(Class<F> flagsClass, Object obj, boolean[] ok)
- saveObject
  
  public static void saveObject(QDataStream stream, Object variant)
- saveObject
  
  public static void saveObject(QDataStream stream, Object variant, Boolean[] ok)
- loadObject
  
  public static Object loadObject(QDataStream stream)
- loadObject
  
  public static Object loadObject(QDataStream stream, Boolean[] ok)

Class QVariant

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Details