datareader.java

来自「一个J2SE的简单入门」· Java 代码 · 共 37 行

package 第九章;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;

public class DataReader {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			DataOutputStream out2 = new DataOutputStream(
					new BufferedOutputStream(new FileOutputStream(
							"e:/datatest.txt")));
			out2.writeDouble(3.1415926);
			out2.close();
			DataInputStream in5 = new DataInputStream(new BufferedInputStream(
					new FileInputStream("e:/datatest.txt")));
			BufferedReader in5br = new BufferedReader(
					new InputStreamReader(in5));
			System.out.println(in5.readDouble());
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}