这篇文章主要介绍了JAVA语言输入输出流的示例代码,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
public class IOStreamDemo {
public void samples() throws IOException {
//1. 这是从键盘读入一行数据,返回的是一个字符串 BufferedReader stdin =new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter a line:"); System.out.println(stdin.readLine());
//2. 这是从文件中逐行读入数据
BufferedReader in = new BufferedReader(new FileReader("IOStreamDemo.java")); String s, s2 = new String(); while((s = in.readLine())!= null) s2 += s + "
"; in.close();
//3. 这是从一个字符串中逐个读入字节 StringReader in1 = new StringReader(s2); int c; while((c = in1.read()) != -1) System.out.print((char)c);
//4. 这是将一个字符串写入文件 try { BufferedReader in2 = new BufferedReader(new StringReader(s2)); PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("IODemo.out"))); int lineCount = 1; while((s = in2.readLine()) != null ) out1.println(lineCount++ + ": " + s); out1.close(); } catch(EOFException e) { System.err.println("End of stream"); } }
}
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