pulic File (File path,String file)
public File(Stirng path,String file)
public File(String fileOrPath)RandomAccessFile(File file,String mode) throws Exception
RandomAccessFile(String name,String mode)throws Exceptionpublic FileReader(String filename)
public FileReader(File file)标注有红色的怎么用,不太明白,求解,感激不尽!
public File(Stirng path,String file)
public File(String fileOrPath)RandomAccessFile(File file,String mode) throws Exception
RandomAccessFile(String name,String mode)throws Exceptionpublic FileReader(String filename)
public FileReader(File file)标注有红色的怎么用,不太明白,求解,感激不尽!
File f = new File("d:\\abc.txt");FileReader fr = new FileReader(f);
代码1与代码2效果一样
代码1:
import java.io.File;
public class FileTest11 {
public static void main(String[] args) throws Exception {
File f=new File("d:\\","abc.txt");
f.createNewFile();}}
代码2:
import java.io.File;
public class FileTest11 {
public static void main(String[] args) throws Exception {
File f=new File("d:\\abc.txt");
f.createNewFile();}}File路径名字符串是绝对路径名,则用与系统有关的方式将它转换成一个相对路径名
在UNIX中,"/"为绝对路径名
Windows 系统上,"\\"为绝对路径名
通常我们都在为window编程,所以你问的用得不多,我们都不写出来,直接写成null了
public FileReader(File file) File是文件对象 需要根据对象读取内容