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java.lang包
java.lang
java
.net
Boolean
System.Boolean
System. Byte
System.Char
Class
System.Type
Double
System.Double
Float
System.Single
Integer
System.Int32
Long
System.Int64
Math
System.Math
Object
System.Object
Process
System. Diagnostics .Process
Runtime
System. Diagnostics .Process
Short
System.Int16
StrictMath
System.Math
Strng
System.Strng
StringBuffer
System. Text .StringBuffer
Thread
System. Threading .Thread
ThreadLocal
System.LocalDataStoreSlot
java.lang.reflect
java
.net
AccessibleObject
System.reflection.MemberInfo
Array
System. Array
Constructor
System.reflection.ConstructorInfo
Field
System.reflection.FieldInfo
Method
System.reflection.MethodInfo
Modifier
System.reflection.MethodAttributes
ReflectdPermission
System. Security . Permissions.ReflectdPermission
java.lang.ref
java
.net
WeakReference
System.WeakReference
java.util包
java.util
java
.net
AbstractColletion
System.Collections.CollectionsBase
ArrayList
System.Collections.ArrayList
Arrays
System.Arrays
BitSet
System.Collections.BitArray
Calendar
System.Globalization.Calendar
Currency
System.Globalization.RegionInfo
Date
System.Datetime
Dictionary
System.Collections.DictionaryBase
EventObject
System.EventArgs
GregorianCalendar
System.Globalization.GregorianCalendar
HashMap
System.Collections.HashMap
Hashtable
System.Collections.HashMap
ListResourseBundle
System.Resources.ResourceManger
Locale
System.Globalization.CultureInfo
Random
System.Random
ResourseBundle
System.Resources.ResourceSet
SimpleTimeZone
System.Datetime
Stack
System.Collections.Stack
Timer
System.Threading.Timer
TimerTask
System.Threading.TimerCallback
TimeZone
System.DataTime
TreeSet
System.Collections.SortedList
Vector
System.Collections.ArrayList
java.util.regex
java
.net
Matcher
System.Text.RegularExpressions.Match
System.Text.RegularExpressions.MatchCollection
System.Text.RegularExpressions.Group
System.Text.RegularExpressions.GroupCollection
Pattern
System.Text.RegularExpressions.Regex
System.Text.RegularExpressions.RegexCompilationInfo
System.Text.RegularExpressions.RegexOption
PatternSyntaxExcetpion
System. ArgumentExcetion
java.util.logging/java.util.jar/java.util.zip/java.util.pref 包中的类在.NET中没有与之对应的部分
java.io包
java
.net
BufferedInputStream
System.IO.BufferedStream
BufferedOutputStream
System.IO.BufferedStream
BufferedReader
System.IO.StreamReader
BufferedWriter
System.IO.StreamWriter
ByteArrayInputStream
System.IO.MemoryStream
ByteArrayOutputStream
System.IO.MemoryStream
CharArrayReader
System.IO.StreamReader
CharArrayWriter
System.IO.StreamWriter
DataInputStream
System.IO.BinaryReader
DataOutputStream
System.IO.BinaryWriter
File
System.IO.File
FileInputStream
System.IO.FileStream
FileOutputStream
System.IO.FileStream
FileReader
System.IO.StreamReader
FileWriter
System.IO.StreamWriter
InputStream
System.IO.Stream
OutputStream
System.IO.Stream
PrintStream
System.IO.StreamWriter
PrintWriter
System.IO.StreamWriter
PushbackInputStream
System.IO.StreamReader
PushbackOutputStream
System.IO.StreamReader
RamdomAccessFile
System.IO.FileStream
StringBufferInputstream
System.IO.StringReader
StringReader
System.IO.StringReader
StringWriter
System.IO.StringWriter
java.sql包
.net 中没有与javax.sql包直接对应的部分，System.Data命名空间提供了连接池和事务处理类。
java的Rowset类在某些方面与.net的DataDet类相似
java
.net
Blob
System.Data.Sqlclient.SqlDataReader
System.Data.OleDb.OleDbDataReader
CallableStatement
System.Data.Sqlclient.Sqlcommand
System.Data.OleDb.OleDbcommand
Clob
System.Data.Sqlclient.SqlDataReader
System.Data.OleDb.OleDbDataReader
Connection
System.Data.Sqlclient.Sql
System.Data.OleDb.OleDb
Date
System.Data. SqlTypes . SqlDateTime
ParameterMetaData
System.Data.Sqlclient.SqlParameter
System.Data.OleDb.OleDbParameter
PreparedStatement
System.Data.Sqlclient.SqlCommand
System.Data.OleDb.OleDbCommand
ResultSet
System.Data.Sqlclient.SqlDataReader
System.Data.OleDb.OleDbDataReader
ResultSetMetaData
System.Data.Sqlclient.SqlDataReader
System.Data.OleDb.OleDbDataReader
Savepoint
System.Data.Sqlclient. SqlTransaction
SQLPermission
System.Data.Sqlclient.SqlclientPermission
System.Data.OleDb.OleDbPermission
Statement
System.Data.Sqlclient.SqlParameter
System.Data.OleDb.OleDbCommand
Time
System.Data. SqlTypes . SqlDateTime
Types
System.Data.DbTypes
java.text包
java
.net
DataFormat
System.DateTime
DateFomatSymbols
System.Globalization.DateaTimeFormatInfo
NumberFormat
System.Globalization.NumberFormatInfo
SimpleDateFormat
System.Globalization.DateTimeFormatInfo
StringCharacterIterator
System.IEnumerator (System,String)
org.w3c.dom包
java
.net
Attr
System.Xml.XmlAttribute
CdatSection
System.Xml.XmlCDataSetion
CharacterData
System.Xml.XmlCharacterData
Comment
System.Xml.XmlComment
Document
System.Xml.XmlDocument
DocumentFragment
System.Xml.XmlDocumentFragment
DocumentType
System.Xml.XmlDocumentType
DOMImplementation
System.Xml.XmlDOMImplementation
Element
System.Xml.XmlElement
Entity
System.Xml.XmlEntity
EntityReference
System.Xml.XmlEntityReference
NameNodeMap
System.Xml.XmlNameNodeMap
Node
System.Xml.XmlNode
NodeList
System.Xml.XmlNodeList
Notation
System.Xml.XmlNotation
ProcessingInstruction
System.Xml.XmlProcessingInstruction
DOMException
System.ArgumentException
javax.swing包
.net没有提供与下列包直接等价的类：
javax.swing.plaf/javax.swing.border/javax.swing.table/javax.swing.text( 可用System.Windows.Form.RichTextBox 代替 ) 和 javax.swing.filechooser （ 可用System.Windows.Form.OpenFileDialog 和 System.Windows.Form.SaveFileDialog 代替 ）
javax.swing
java
.net
AbstractButton
System.Windows.Forms. ButtonBase
AbstractListModel
System.Windows.Forms.ListControl
AbstractSpinnerModel
System.Windows.Forms.UpDownBase
ImageIcon
System.Windows.Forms.Image
Jbutton
System.Windows.Forms.Button
JCheckBox
System.Windows.Forms.CheckBox
JColorChooser
System.Windows.Forms.ColorDialog
JComboBox
System.Windows.Forms.ComboBox
JComponent
System.Windows.Forms.UserControl
JDialog
System.Windows.Forms.CommonDialog
JEditorpane
System.Windows.Forms.TextBoxBase
JFileChooser
System.Windows.Forms.OpenFileDialog
JFormattedTextField
System.Windows.Forms.RichTextBox
JFrame
System.Windows.Forms.Form
JLabel
System.Windows.Forms.Label
JList
System.Windows.Forms.ListBox
JMenuBar
System.Windows.Forms.MainMenu
JMenuItem
System.Windows.Forms.MenuItem
JPanel
System.Windows.Forms.Panel
JPasswordField
System.Windows.Forms.TextBox
JPopupMenu
System.Windows.Forms.ContextMenu
JProgressBar
System.Windows.Forms.ProgressBar StatusBar
JRadioButton
System.Windows.Forms.RadioButton
JScrollBar
System.Windows.Forms.HScrollBar
System.Windows.Forms.VScrollBar
JScrollPane
System.Windows.Forms.Panel
JSlider
System.Windows.Forms.TrackBar
JSpinner
System.Windows.Forms.DomainUpDown
JSpitPane
System.Windows.Forms.Splitter
JTable
System.Windows.Forms.ListView
JTextArea
System.Windows.Forms.TextBox
JTextField
System.Windows.Forms.TextBox
JTextPane
System.Windows.Forms.RichTextBox
JTogleButton
System.Windows.Forms. ButtonBase
JToolBar
System.Windows.Forms.ToolBar
JToolTip
System.Windows.Forms.ToolTip
JTree
System.Windows.Forms.ListView
Popup
System.Windows.Forms.ContextMenu
Timer
System.Windows.Forms.Timer
javax.swing.event
java
.net
CaratEvent
System.EventArgs
ListDataEvent
System.EventArgs
ListSelectionEvent
System.EventArgs
MenuEvent
System.EventArgs
PopupMenuEvent
System.EventArgs
java.awt包
java.awt
java
.net
AWTEvernt
System.EventArgs
AWTKeyStroke
System.Windows.Forms.KeyPressEventArgs
AWTPermission
System.Security.Permissions.UIPermission
BasicStroke
System.Drawing.Pen
Button
System.Windows.Forms.Button
Canvas
System.Windows.Forms. Control
CheckBox
System.Windows.Forms.RadioButton
Choice
System.Windows.Forms.ComboBox
Color
System.Drawing.Color
Component
System.Windows.Forms. Control
Container
System.Windows.Forms. Control
Cursor
System.Windows.Forms.Cursor
Dialog
System.Windows.Forms.CommonDialog
Dimension
System.Drawing.Size
Event
System.EventArgs
FileDialog
System.Windows.Forms.FileDialog
Font
System.Drawing.Font
Frame
System.Windows.Forms.Form
GradientPaint
System.Drawing.Drawing2D.LinearGradientBrush
Graphics
System.Drawing.Graphics
Graphics2D
System.Drawing.Graphics
Image
System.Drawing.Image
JobAttribute
System.Drawing.Printing. PageSettings
Label
System.Windows.Forms.Label
List
System.Windows.Forms.ListBox
Menu
System.Windows.Forms.MainMenu
MenuItem
System.Windows.Forms.MenuItem
PageAttributes
System.Drawing.Printing. PageSettings
Panel
System.Windows.Forms. Panel
Point
System.Drawing.Point
PopupMenu
System.Windows.Forms.ContextMenu
PrintJob
System.Drawing.Printing.PrintDocument
Rectangle
System.Drawing.Rectangle
Scrollbar
System.Windows.Forms.HScrollbar
System.Windows.Forms.VScrollbar
ScrollPane
System.Windows.Forms. Panel
TextArea
System.Windows.Forms. TextBox
TextField
System.Windows.Forms. TextBox
TexturePaint
System.Drawing.TextreBrush
java.awt.event
java
.net
ActionEvent
System.EventArgs
AdjustmentEvent
System.Windows.Forms.ScrollEventArgs
ComponentEvent
System.EventArgs
ContainerEvent
System.Windows.Forms.ControlEventArgs
FocusEvent
System.EventArgs
ItemEvent
System.EventArgs
KeyEvent
System.Windows.Forms.KeyPressEventArgs
MouseEvent
System.Windows.Forms.MouseEventArgs
PaintEvent
System.Windows.Forms.PaintEventArgs
TextEvent
System.EventArgs
WindowEvent
System.EventArgs
java.awt.print
java
.net
PageFormat
System.Drawing.Printing.PageSettings
Paper
System.Drawing.Printing.PageSize
PrinterJob
System.Drawing.Printing.PrintDocument