import java.io.*;
public class waibupaixu {
    static int[] arr=new int[10];
    final static int MAXCOUNT=1000;
    public static void createRandomNumberFile() throws IOException {
        RandomAccessFile raf = new RandomAccessFile("raw", "rw");
        FileOutputStream fos = new FileOutputStream("source.txt");
        PrintStream ps = new PrintStream(fos);
        PrintStream   old   =   System.out;  
        System.setOut(ps);
        int randomNum;
        for (int i = 0; i < MAXCOUNT; i++) {
            randomNum = (int) (Math.random() * 10000);
            raf.writeInt(randomNum);

            System.out.print(randomNum + "\t");
            if ((i + 1) % 5 == 0) {
                System.out.println();
            }
        }
        System.setOut(old);
        ps.close();
        fos.close();
    }
    
     public static void main(String[] args) throws IOException 
    {
         RandomAccessFile rafa[] = new RandomAccessFile[10];//外部文件 等待归并
         RandomAccessFile rafb = null;                        //外部文件 归并目标
         int min;                                            //等待归并的元素 定位
         int cnt_all=0;                                        //1000个计数
         
         createRandomNumberFile();
         
         for (int i = 0; i < 100; i++) {
             readRandomNumberFile("raw",i*10,10);    //读10个
             sort_arr();                            //排序
             writeRandomNumberFile("raw10_"+i,0,10);    //写小文件
             Raw2Txt("raw10_"+i,"sort10_"+i+"+.txt",10);
         }
         
         for (int i = 0; i < 10; i++) {
             rafb=new RandomAccessFile("raw100_"+i, "rw");
             //读入10个
             for (int j = 0; j < 10; j++) {
                 rafa[j]=new RandomAccessFile("raw10_"+(10*i+j), "rw");
                 arr[j]=rafa[j].readInt();
             }
             //剩余90个
             for (int j = 0; j < 100; j++) {
                 min=0;
                 for (int k = 0; k< 10; k++) {
                     if(arr[k]!=-1)
                         min=k;
                 } 
                 //找到最小
                 for (int k = 0; k< 10; k++) {
                     System.out.print(""+" || "+arr[k] );
                     System.out.println();
                     
                     if(arr[k]<arr[min]&&arr[k]!=-1)
                         min=k;
                 } 
                 //保存
                 if(arr[min]!=-1){
                     rafb.writeInt(arr[min]);                     
                 }

                 
                 //替补读入
                 System.out.println(""+" || "+j +" || "+min+" || "+arr[min]);
                 
                 if( rafa[min].getFilePointer() < rafa[min].length()&& arr[min]!=-1)
                 {
                         arr[min]=rafa[min].readInt();                     
                 }
                 else
                 {
                         arr[min]=-1;                         
                 }
             }             
         }    
         
         
         
         rafb=new RandomAccessFile("raw1000", "rw");
         //读入10个
         for (int i = 0; i < 10; i++) {
             rafa[i]=new RandomAccessFile("raw100_"+i, "rw");
             Raw2Txt("raw100_"+i,"sort100_"+i+".txt",100);             
             arr[i]=rafa[i].readInt();
         }
         //剩余990个
         for (int i = 0; i < 1000; i++) {
             min=0;
             for (int k = 0; k< 10; k++) {
                 if(arr[k]!=-1)
                     min=k;
             } 
             //找到最小
             for (int k = 0; k< 10; k++) {
                 System.out.print(""+" || "+arr[k] );
                 System.out.println();
                 
                 if(arr[k]<arr[min]&&arr[k]!=-1)
                     min=k;
             } 
            //保存
             cnt_all++;
             System.out.println(""+" ||----------------------------------------> "+cnt_all );             
             if(arr[min]!=-1){
                 rafb.writeInt(arr[min]);                     
             }
             //替补读入
             System.out.println(""+" || "+i +" || "+min+" || "+arr[min]);
             System.out.println(""+"++++++++++++++++++++++++++++++++++++++");             
             if( rafa[min].getFilePointer() < rafa[min].length()  && arr[min]!=-1)
             {
                     arr[min]=rafa[min].readInt();                     
             }
             else
             {
                     arr[min]=-1;                         
             }
         }    
         
         Raw2Txt("raw1000","sort1000.txt",1000);
    }
     public static void sort_arr(  ){
             int tmp;
            for (int i = 0; i < 9; i++) {
                for (int j = i+1; j < 10; j++) {
                    if(arr[i] > arr[j])
                    {
                        tmp=arr[i];
                        arr[i]=arr[j];
                        arr[j]=tmp;
                    }
                }                
            }
        }     
    //从位置m，读入n个整数到arr数组    
    public static void readRandomNumberFile(String file,long m,long n) throws IOException 
    {
        RandomAccessFile raf = new RandomAccessFile(file, "rw");
        raf.seek(Integer.SIZE/8*(m));
        for (int i = 0; i < n; i++) {
            arr[i]=raf.readInt();
        }
    }
    //从位置m，将arr数组的n个整数写入文件       
    public static void writeRandomNumberFile(String file,long m,long n) throws IOException 
    {
        RandomAccessFile raf = new RandomAccessFile(file, "rw");
        raf.seek(Integer.SIZE/8*(m));
        for (int i = 0; i < n; i++) {
            raf.writeInt(arr[i]);
        }
    }
    public static void Raw2Txt(String src,String dst,long n) throws IOException {
        int tmp;
        RandomAccessFile raf = new RandomAccessFile(src, "rw");
        FileOutputStream fos = new FileOutputStream(dst);
        PrintStream ps = new PrintStream(fos);
        System.out.println(""+"file of int "+(raf.length()/4));
        PrintStream   old   =   System.out;  
        System.setOut(ps);
        for (int i = 0; i < n; i++) {
            tmp =raf.readInt();
            System.out.print(tmp + "\t");
            if ((i + 1) % 5 == 0) {
                System.out.println();
            }
        }
        System.setOut(old);
        ps.close();
        fos.close();
    }    
}