例子
以下示例显示java.io.DataOutputStream.writeDouble(double v)方法的用法。
package com.jc2182;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class DataOutputStreamDemo {
public static void main(String[] args) throws IOException {
InputStream is = null;
DataInputStream dis = null;
FileOutputStream fos = null;
DataOutputStream dos = null;
double[] dbuf = {65.56,66.89,67.98,68.82,69.55,70.37};
try {
// create file output stream
fos = new FileOutputStream("c:\\test.txt");
// create data output stream
dos = new DataOutputStream(fos);
// for each byte in the buffer
for (double d:dbuf) {
// write double to the data output stream
dos.writeDouble(d);
}
// force bytes to the underlying stream
dos.flush();
// create file input stream
is = new FileInputStream("c:\\test.txt");
// create new data input stream
dis = new DataInputStream(is);
// read till end of the stream
while(dis.available()>0) {
// read character
double c = dis.readDouble();
// print
System.out.print(c + " ");
}
} catch(Exception e) {
// if an I/O error occurs
e.printStackTrace();
} finally {
// releases all system resources from the streams
if(is!=null)
is.close();
if(dos!=null)
is.close();
if(dis!=null)
dis.close();
if(fos!=null)
fos.close();
}
}
}
让我们编译并运行以上程序,这将产生以下结果-
65.56 66.89 67.98 68.82 69.55 70.37