org.vishia.util

Class OutputTwice

java.lang.Object

org.vishia.util.OutputTwice

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable

public class OutputTwice
extends java.lang.Object
implements java.lang.Appendable, java.io.Closeable, java.io.Flushable

This class outputs to 2 destination, for example an opened file and System.out. Since 2022-09: Also Closeable and Flushable, Flushable.flush() is often necessary and desired, Closeable.close() is sometimes necessary. If the referred outputs are not Closeable or not Flushable, it is not a problem. But this instance expects now close() as warning also if the referred outputs does not need it. Advantage: More universal usable, especially for log and reports.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Appendable	out1
private java.lang.Appendable	out2

Constructor Summary

Constructors

Constructor and Description
OutputTwice(java.lang.Appendable out1, java.lang.Appendable out2) Creates both outputs can be null, prevent output (since 2022-09).

Method Summary

Modifier and Type	Method and Description
java.lang.Appendable	append(char c)
java.lang.Appendable	append(java.lang.CharSequence csq)
java.lang.Appendable	append(java.lang.CharSequence csq, int start, int end)
void	close()
void	flush()

Methods inherited from class java.lang.Object

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

Field Detail

out1

private final java.lang.Appendable out1

out2

private final java.lang.Appendable out2

Constructor Detail

OutputTwice

public OutputTwice(java.lang.Appendable out1,
                   java.lang.Appendable out2)

Creates
both outputs can be null, prevent output (since 2022-09). both outputs are used also to flush() and close() if they are Closeable and Flushable.

Parameters:

out1 - can be a simple StringBuilder, but also any Writer

out2 -

Method Detail

append

public java.lang.Appendable append(java.lang.CharSequence csq)
                            throws java.io.IOException

Specified by:

append in interface java.lang.Appendable

Throws:

java.io.IOException

append

public java.lang.Appendable append(java.lang.CharSequence csq,
                                   int start,
                                   int end)
                            throws java.io.IOException

Specified by:

append in interface java.lang.Appendable

Throws:

java.io.IOException

append

public java.lang.Appendable append(char c)
                            throws java.io.IOException

Specified by:

append in interface java.lang.Appendable

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.io.IOException