package inout.test;
import java.io.*;
public class Test {
public static void main(String args[])
{
FileInputStream fis=null;
DataInputStream dis=null;
FileOutputStream fos=null;
DataOutputStream dos=null;
try {
for(int i=0;i<10;i++)
{
fos=new FileOutputStream("E:/w.txt");
dos=new DataOutputStream(fos);
double x=Math.random()*100;
double y=Math.random()*100;
dos.writeDouble(x);
dos.writeDouble(y);
System.out.println(x);
System.out.println(y);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
dos.close();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
fis=new FileInputStream("E:/w.txt");
dis=new DataInputStream(fis);
double a;
while((a=dis.read())!=-1)
{
System.out.println(a);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
dis.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
} }
}
import java.io.*;
public class Test {
public static void main(String args[])
{
FileInputStream fis=null;
DataInputStream dis=null;
FileOutputStream fos=null;
DataOutputStream dos=null;
try {
for(int i=0;i<10;i++)
{
fos=new FileOutputStream("E:/w.txt");
dos=new DataOutputStream(fos);
double x=Math.random()*100;
double y=Math.random()*100;
dos.writeDouble(x);
dos.writeDouble(y);
System.out.println(x);
System.out.println(y);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
dos.close();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
fis=new FileInputStream("E:/w.txt");
dis=new DataInputStream(fis);
double a;
while((a=dis.read())!=-1)
{
System.out.println(a);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
dis.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
} }
}
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import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;public class Test {
public static void main(String args[]) {
FileInputStream fis = null;
DataInputStream dis = null;
FileOutputStream fos = null;
DataOutputStream dos = null;
try {
//要在这里生成新对象,否则每次都写到新的文件,覆盖掉原来的内容
fos = new FileOutputStream("E:/w.txt");
dos = new DataOutputStream(fos);
for (int i = 0; i < 10; i++) {
double x = Math.random() * 100;
double y = Math.random() * 100;
dos.writeDouble(x);
dos.writeDouble(y);
}
} catch (Exception e) { e.printStackTrace();
} finally {
try {
dos.close();
fos.close();
} catch (IOException e) { e.printStackTrace();
}
}
try {
fis = new FileInputStream("E:/w.txt");
dis = new DataInputStream(fis);
double a;
//这里做了些处理
while (Double.isNaN(a = dis.readDouble()) == false) {
System.out.println(a);
}
} catch (Exception e) {
if(e instanceof EOFException) {
System.out.println("读完了");
} else {
e.printStackTrace();
}
} finally {
try {
dis.close();
fis.close();
} catch (IOException e) { e.printStackTrace();
}
}
}
}
* ***********改成下面这样******************
*/
while (true) {
try {
a = dis.readDouble();
} catch (EOFException e) {
break;
}
System.out.println(a);
}
/*
* *****************************************
*/
public static void main(String args[]) {
FileInputStream fis = null;
DataInputStream dis = null;
FileOutputStream fos = null;
DataOutputStream dos = null;
try {
for (int i = 0; i < 10; i++) {
fos = new FileOutputStream("F:/w.txt");
dos = new DataOutputStream(fos);
double x = Math.random() * 100;
double y = Math.random() * 100;
dos.writeDouble(x);
dos.writeDouble(y);
System.out.println(x);
System.out.println(y);
}
} catch (Exception e) { e.printStackTrace();
} finally {
try {
dos.close();
fos.close();
} catch (IOException e) { e.printStackTrace();
}
}
try {
fis = new FileInputStream("F:/w.txt");
dis = new DataInputStream(fis);
double a;
/*
* ***********改成下面这样******************
*/
while (true) {
try {
a = dis.readDouble();
} catch (EOFException e) {
break;
}
System.out.println(a);
}
/*
* *****************************************
*/
} catch (Exception e) { e.printStackTrace();
} finally {
try {
dis.close();
fis.close();
} catch (IOException e) { e.printStackTrace();
}
} }
}
88.24052131415459
42.10427831043786
97.62593318159414
77.47038940410273
52.768525566126726
11.884276379383895
36.94023535303982
90.14372419660332
95.06617986414537
97.96870473140659
18.68726180676682
41.04677341484643
41.62175760326863
46.25529459153687
21.183624015510127
30.925908794025826
86.41966996938136
86.70378085958089
65.7545573446809
44.72963875871506
65.7545573446809
44.72963875871506