| Package | Description | 
|---|---|
| java.io | 
 Contains Input/Output streams communication classes. 
 | 
| java.lang | 
 Contains core language classes. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
OutputStreamWriter
An OutputStreamWriter is a bridge from character streams to byte streams: Characters written to
 it are encoded into bytes using a specified  
charset. | 
class  | 
PrintStream
A  
PrintStream adds functionality to another output stream, namely the ability to
 print representations of various data values conveniently. | 
class  | 
Writer
Abstract class for writing to character streams. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
StringBuffer
A thread-safe, mutable sequence of characters. 
 | 
class  | 
StringBuilder
A mutable sequence of characters. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
Appendable | 
Appendable.append(char c)
Appends the specified character to this  
Appendable. | 
Appendable | 
Appendable.append(CharSequence csq)
Appends the specified character sequence to this  
Appendable. | 
Appendable | 
Appendable.append(CharSequence csq,
      int start,
      int end)
Appends a subsequence of the specified character sequence to this  
Appendable. |