org.apache.commons.io.output

类 StringBuilderWriter

java.lang.Object

java.io.Writer

org.apache.commons.io.output.StringBuilderWriter

所有已实现的接口:

Closeable, Flushable, Serializable, Appendable, AutoCloseable

public class StringBuilderWriter
extends Writer
implements Serializable

Writer implementation that outputs to a StringBuilder.

NOTE: This implementation, as an alternative to java.io.StringWriter, provides an un-synchronized (i.e. for use in a single thread) implementation for better performance. For safe usage with multiple Threads then java.io.StringWriter should be used.

从以下版本开始:

2.0

另请参阅:

序列化表格

字段概要

从类继承的字段 java.io.Writer

lock

构造器概要

构造器

构造器和说明
StringBuilderWriter() Constructs a new StringBuilder instance with default capacity.
StringBuilderWriter(int capacity) Constructs a new StringBuilder instance with the specified capacity.
StringBuilderWriter(StringBuilder builder) Constructs a new instance with the specified StringBuilder.

方法概要

限定符和类型	方法和说明
Writer	append(char value) Appends a single character to this Writer.
Writer	append(CharSequence value) Appends a character sequence to this Writer.
Writer	append(CharSequence value, int start, int end) Appends a portion of a character sequence to the StringBuilder.
void	close() Closing this writer has no effect.
void	flush() Flushing this writer has no effect.
StringBuilder	getBuilder() Returns the underlying builder.
String	toString() Returns StringBuilder.toString().
void	write(char[] value, int offset, int length) Writes a portion of a character array to the StringBuilder.
void	write(String value) Writes a String to the StringBuilder.

从类继承的方法 java.io.Writer

write, write, write

从类继承的方法 java.lang.Object

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

构造器详细资料

StringBuilderWriter

public StringBuilderWriter()

Constructs a new StringBuilder instance with default capacity.

StringBuilderWriter

public StringBuilderWriter(int capacity)

Constructs a new StringBuilder instance with the specified capacity.

参数:

capacity - The initial capacity of the underlying StringBuilder

StringBuilderWriter

public StringBuilderWriter(StringBuilder builder)

Constructs a new instance with the specified StringBuilder.

If builder is null a new instance with default capacity will be created.

参数:

builder - The String builder. May be null.

方法详细资料

append

public Writer append(char value)

Appends a single character to this Writer.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

value - The character to append

返回:

This writer instance

append

public Writer append(CharSequence value)

Appends a character sequence to this Writer.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

value - The character to append

返回:

This writer instance

append

public Writer append(CharSequence value,
                     int start,
                     int end)

Appends a portion of a character sequence to the StringBuilder.

指定者:

append 在接口中 Appendable

覆盖:

append 在类中 Writer

参数:

value - The character to append

start - The index of the first character

end - The index of the last character + 1

返回:

This writer instance

close

public void close()

Closing this writer has no effect.

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

指定者:

close 在类中 Writer

flush

public void flush()

Flushing this writer has no effect.

指定者:

flush 在接口中 Flushable

指定者:

flush 在类中 Writer

write

public void write(String value)

Writes a String to the StringBuilder.

覆盖:

write 在类中 Writer

参数:

value - The value to write

write

public void write(char[] value,
                  int offset,
                  int length)

Writes a portion of a character array to the StringBuilder.

指定者:

write 在类中 Writer

参数:

value - The value to write

offset - The index of the first character

length - The number of characters to write

getBuilder

public StringBuilder getBuilder()

Returns the underlying builder.

返回:

The underlying builder

toString

public String toString()

Returns StringBuilder.toString().

覆盖:

toString 在类中 Object

返回:

The contents of the String builder.