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Java FileWriter class

FileWriter class from OutputStreamReader class inherited. Such data is written to the stream by character. You can create objects needed through the following constructor.

Constructs a FileWriter object given a File object. 

FileWriter(File file)

Constructs a FileWriter object given a File object. 

 FileWriter(File file, boolean append)

Construct a file descriptor associated with FileWriter object. 

FileWriter(FileDescriptor fd)

Construction FileWriter object given a file name, indicating whether it has a pending write data boolean value. 

FileWriter(String fileName, boolean append)

After creating FileWriter object, you can refer to the following list of file operation method.

No. Method Description
1 public void write (int c) throws IOException
Write a single character c.
2 public void write (char [] c , int offset, int len)
Writes the character array to begin to offset a portion of a length of len.
3 public void write (String s, int offset, int len)
Write the string began to offset a portion of a length of len.

Examples 

import java.io.*;
public class FileRead{
   public static void main(String args[])throws IOException{
      File file = new File("Hello1.txt");
      // 创建文件
      file.createNewFile();
      // creates a FileWriter Object
      FileWriter writer = new FileWriter(file); 
      // 向文件写入内容
      writer.write("This\n is\n an\n example\n"); 
      writer.flush();
      writer.close();
      //创建 FileReader 对象
      FileReader fr = new FileReader(file); 
      char [] a = new char[50];
      fr.read(a); // 从数组中读取内容
      for(char c : a)
          System.out.print(c); // 一个个打印字符
      fr.close();
   }
}

The above examples compiled results are as follows: 

This
is
an
example