Java开发网 - Re:io问题

Java开发网

您没有登录

» Java开发网 » Java SE 综合讨论区 » Java与OOP初步

打印话题 寄给朋友 订阅主题

作者

Re:io问题 [Re:joelwx]

bohui0714

发贴: 9
积分: 0

于 2005-07-10 20:55

//PrintStream ps=new PrintStream(new FileOutputStream(file));
PrintStream ps=new PrintStream(new FileOutputStream(file,true));

FileOutputStream
public FileOutputStream(File file,
boolean append)
throws FileNotFoundException
Creates a file output stream to write to the file represented by the specified File object. If the second argument is true, then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection.
First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

Parameters:
file - the file to be opened for writing.
append - if true, then bytes will be written to the end of the file rather than the beginning
Throws:
FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
SecurityException - if a security manager exists and its checkWrite method denies write access to the file.
Since:
1.4

• JAVA学习日子分享

话题树型展开

人气	标题	作者	字数	发贴时间
9326	io问题(new PrintStream总把上次的数据清空)	joelwx	150	2005-07-09 10:12
7362	Re:io问题	bohui0714	1332	2005-07-10 20:55
7224	Re:io问题	joelwx	5	2005-07-11 08:19
7209	Re:io问题	Destroyer	15	2005-08-30 07:25
7462	Re:io问题	SUPLAD	48	2005-09-13 17:04
7511	Re:io问题	why	290	2005-09-13 23:50

已读帖子

新的帖子

被删除的帖子