Question

编写一个程序,利用RandomAccessFile类往文本文件"test.txt"先写入1-10十个整数数,之后将第3

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Answer 1

package io;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class z5
{
public static void main(String[] args)
{
try
{
RandomAccessFile a=new RandomAccessFile("text.txt","rw");
for(int i=1;i<=10;i ++)
{ a.writeInt(i); }

a.seek(0);
for(int i=1;i<=10;i++ ) {
System.out.print(" ");
System.out.print(a.readInt());
}
System.out.println();

a.seek(8);
a.writeInt(0);
a.seek(0);

for(int i=1;i<=10;i++ )
{ System.out.print(" ");
System.out.print(a.readInt()); }
System.out.println();
}

catch(FileNotFoundException e){
e.printStackTrace();
}
catch(IOException e){
e.printStackTrace();
}
}
}