java 程序调试

我的aa.txt文件中的内容如下：

123

2.3

true

用

int i=din.readInt();

float f=din.readFloat();

boolean b=din.readBoolean();

读取是不正确的，因文本文件中的数据是字符型，有哪位高手，能将文本文件中的数据读取后转换成对应的int ,float, boolean型

请教 请教。

一定有分加，

谢谢！

import java.io.*;

public class File5

{

public static void main(String[] args)throws IOException

{

int ch;

File file1=new File("E:\\javatest\\aa.txt");

File file2=new File("E:\\javatest\\aaa.txt");

try

{

FileInputStream fin= new FileInputStream(file1);

DataInputStream din =new DataInputStream(fin);

int i=din.readInt();

float f=din.readFloat();

boolean b=din.readBoolean();

din.close();

FileOutputStream fout= new FileOutputStream(file2);

DataOutputStream dout =new DataOutputStream(fout);

dout.writeInt(i);

dout.writeFloat(f);

dout.writeBoolean(b);

dout.close();

System.out.println("整数: "+i);

System.out.println("浮点数: "+f);

System.out.println("布尔量: "+b);

}

catch (FileNotFoundException e)

{ System.out.println(e);}

catch (IOException e)

{ System.out.println(e);}

}

}

只是按照你的要求改的，你看看吧。

import java.io.*;

public class File5

{

public static void main(String[] args)throws IOException

{

byte buf[]=new byte[15];

File file1=new File("E:\\javatest\\aa.txt");

File file2=new File("E:\\javatest\\aaa.txt");

try

{

FileInputStream fin= new FileInputStream(file1);

DataInputStream din =new DataInputStream(fin);

fin.read(buf, 0,10);

String str=new String(buf,0,3);

int i=Integer.parseInt(str);

//int i=din.readInt();

str=new String(buf,5,3);

float f=Float.parseFloat(str);

//float f=din.readFloat();

boolean b=din.readBoolean();

din.close();

FileOutputStream fout= new FileOutputStream(file2);

DataOutputStream dout =new DataOutputStream(fout);

dout.writeChars(Integer.toString(i));

dout.writeChars(Float.toString(f));

if(b)

str="true";

else

str="false";

dout.writeChars(str);

dout.close();

System.out.println("整数: "+i);

System.out.println("浮点数: "+f);

System.out.println("布尔量: "+b);

}

catch (FileNotFoundException e)

{ System.out.println(e);}

catch (IOException e)

{ System.out.println(e);}

}

}