void write(int c) void write(char cbuf, int off, int len) void write(String str, int off, int len) 描述 所述java.io.OutputStreamWriter.write(int c)方法写入单个字符。 声明 以下是java.io.OutputStreamWriter.write()方法的声明。 public void write(int c) 参数 c - 指定要写入的字符的int。 返回值 此方法不返回值。 异常 IOException - 如果发生I / O错误。 实例 以下示例显示了java.io.OutputStreamWriter.write()方法的用法。 package com.tutorialspoint; import java.io.*; public class OutputStreamWriterDemo { public static void main(String[] args) { try { // create a new OutputStreamWriter OutputStream os = new FileOutputStream("test.txt"); OutputStreamWriter writer = new OutputStreamWriter(os); // create a new FileInputStream to read what we write FileInputStream in = new FileInputStream("test.txt"); // write something in the file writer.write(70); writer.write(71); writer.write(72); // flush the stream writer.flush(); // read what we write for (int i = 0; i < 3; i++) { System.out.print("" + (char) in.read()); } } catch (Exception ex) { ex.printStackTrace(); } } } 让我们编译并运行上面的程序,这将产生以下结果 FGH void write(char cbuf, int off, int len) void write(String str, int off, int len)