Java软件工程的弹幕调试原则

日期：2019.4.25

博客期：061

星期四

今天是把很久之前的那个相关程序——一维数组的最大和的子数组的求取信息，我们今天的任务就是把每一步的信息都要进行输出查看！

如下图：

　　

 package pvp;

 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.math.BigInteger;
 import java.util.Random;
 import java.util.Scanner;

 public class TestPlay6 {
     public static void run(){
         File f = new File("data/data.txt");
         if(!f.exists())
         {
             System.out.println("文件不存在!");
             System.exit(0);
         }
         //存储导入内容
         String str;
         //内容
         Scanner sc = null;
         try {
             sc = new Scanner(f);
         } catch (FileNotFoundException e1) {
             System.out.println("文件不存在!");
             System.exit(0);
         }
         //最大值
         BigInteger rmax = new BigInteger("0");
         //正数总值
         BigInteger Tnum = new BigInteger("0");
         //负数总值
         BigInteger Fnum = new BigInteger("0");
         //记录是否发生转变
         int sis = 0;
         //标记是第几程度
         int attitude = 0;

         BigInteger start = BigInteger.ZERO,end = BigInteger.ZERO;
         BigInteger true_start = BigInteger.ZERO,true_end = BigInteger.ZERO;
         //循环
         try
         {
             BigInteger sis_s = rmax;
             BigInteger seat = new BigInteger("0");
             if(!sc.hasNext())
             {
                 System.out.println("文件内容为空!");
                 System.exit(0);
             }
             while(sc.hasNext())
             {
                 str = sc.next();
                 BigInteger p = new BigInteger(str);
                 seat = seat.add(BigInteger.ONE);
                 end = seat;
                 if(attitude==0)                    //---------------------------------------[寻找第一个正数]
                 {
                     if(p.compareTo(new BigInteger("0"))<=0)
                         ;
                     else
                     {
                         start = seat;
                         Tnum = p;
                         attitude = 1;
                     }
                 }
                 else if(attitude==1)            //---------------------------------------[上一个数为正数]
                 {
                     if(p.compareTo(new BigInteger("0"))<0)
                     {
                         if(sis==0)
                         {
                             sis = 1;
                             Fnum.add(p);
                         }
                         else
                         {
                             Fnum = p;
                         }
                         attitude = -1;
                     }
                     else
                     {
                         Tnum = Tnum.add(p);
                     }

                     if(Tnum.compareTo(rmax)>0)
                     {
                         rmax = Tnum;
                         true_start = start;
                         true_end = end;
                     }
                 }
                 else                            //---------------------------------------[上一个数为负数]
                 {
                     if(p.compareTo(new BigInteger("0"))>0)
                     {
                         attitude = 1;
                         if(Tnum.compareTo(new BigInteger("0").subtract(Fnum))>0)
                         {
                             Tnum = Tnum.add(Fnum).add(p);
                         }
                         else
                         {
                             Tnum = p;
                             start = seat;
                         }
                     }
                     else
                     {
                         Fnum = Fnum.add(p);
                     }
                 }
                 if(p.compareTo(rmax)>0)
                 {
                     rmax = p;
                     true_start = start;
                     true_end = end;
                 }
                 if(p.compareTo(Tnum)>0)
                 {
                     rmax = Tnum;
                     true_start = start;
                     true_end = end;
                 }
                 if(rmax.equals(sis_s))
                     System.out.println("数据编号:"+seat.toString()+"\t,新数大小:"+p.toString()+"\t,正数总值:"+Tnum.toString()+"\t,负数总值:"+Fnum.toString()+"\t,数组从第"+true_start.toString()+"\t位开始到第"+true_end.toString()+"\t位结束,最大值:"+rmax.toString()+"\t");
                 else
                 {
                     System.err.println("数据编号:"+seat.toString()+"\t,新数大小:"+p.toString()+"\t,正数总值:"+Tnum.toString()+"\t,负数总值:"+Fnum.toString()+"\t,数组从第"+true_start.toString()+"\t位开始到第"+true_end.toString()+"\t位结束,最大值:"+rmax.toString()+"\t");
                     sis_s = rmax;
                 }
                 try {
                     Thread.sleep(1000);
                 } catch (InterruptedException e) {
                     // TODO 自动生成的 catch 块
                     e.printStackTrace();
                 }
             }

         }
         catch( NumberFormatException e){
             System.out.println("输入内容不是数字!");
             System.exit(0);
         }
         sc.close();
     }
     public static void run2(int ls){
         File f = new File("data/data.txt");
         if(!f.exists())
         {
             System.out.println("文件不存在!");
             System.exit(0);
         }
         //存储导入内容
         String str;
         //内容
         Scanner sc = null;
         try {
             sc = new Scanner(f);
         } catch (FileNotFoundException e1) {
             System.out.println("文件不存在!");
             System.exit(0);
         }
         //最大值
         BigInteger rmax = new BigInteger("0");
         //正数总值
         BigInteger Tnum = new BigInteger("0");
         //负数总值
         BigInteger Fnum = new BigInteger("0");
         //记录是否发生转变
         int sis = 0;
         //标记是第几程度
         int attitude = 0;

         BigInteger start = BigInteger.ZERO,end = BigInteger.ZERO;
         BigInteger true_start = BigInteger.ZERO,true_end = BigInteger.ZERO;
         //循环
         try
         {
             BigInteger sis_s = rmax;
             BigInteger seat = new BigInteger("0");
             if(!sc.hasNext())
             {
                 System.out.println("文件内容为空!");
                 System.exit(0);
             }
             BigInteger sss = new BigInteger(Integer.toString(ls));
             while(sc.hasNext())
             {
                 str = sc.next();
                 BigInteger p = new BigInteger(str);
                 seat = seat.add(BigInteger.ONE);
                 end = seat;
                 if(attitude==0)                    //---------------------------------------[寻找第一个正数]
                 {
                     if(p.compareTo(new BigInteger("0"))<=0)
                         ;
                     else
                     {
                         start = seat;
                         Tnum = p;
                         attitude = 1;
                     }
                 }
                 else if(attitude==1)            //---------------------------------------[上一个数为正数]
                 {
                     if(p.compareTo(new BigInteger("0"))<0)
                     {
                         if(sis==0)
                         {
                             sis = 1;
                             Fnum.add(p);
                         }
                         else
                         {
                             Fnum = p;
                         }
                         attitude = -1;
                     }
                     else
                     {
                         Tnum = Tnum.add(p);
                     }

                     if(Tnum.compareTo(rmax)>0)
                     {
                         rmax = Tnum;
                         true_start = start;
                         true_end = end;
                     }
                 }
                 else                            //---------------------------------------[上一个数为负数]
                 {
                     if(p.compareTo(new BigInteger("0"))>0)
                     {
                         attitude = 1;
                         if(Tnum.compareTo(new BigInteger("0").subtract(Fnum))>0)
                         {
                             Tnum = Tnum.add(Fnum).add(p);
                         }
                         else
                         {
                             Tnum = p;
                             start = seat;
                         }
                     }
                     else
                     {
                         Fnum = Fnum.add(p);
                     }
                 }
                 if(p.compareTo(rmax)>0)
                 {
                     rmax = p;
                     true_start = start;
                     true_end = end;
                 }
                 if(p.compareTo(Tnum)>0)
                 {
                     rmax = Tnum;
                     true_start = start;
                     true_end = end;
                 }
                 if(sss.compareTo(seat)<=0)
                 {
                     if(rmax.equals(sis_s))
                         System.out.println("数据编号:"+seat.toString()+"\t,新数大小:"+p.toString()+"\t,正数总值:"+Tnum.toString()+"\t,负数总值:"+Fnum.toString()+"\t,数组从第"+true_start.toString()+"\t位开始到第"+true_end.toString()+"\t位结束,最大值:"+rmax.toString()+"\t");
                     else
                     {
                         System.err.println("数据编号:"+seat.toString()+"\t,新数大小:"+p.toString()+"\t,正数总值:"+Tnum.toString()+"\t,负数总值:"+Fnum.toString()+"\t,数组从第"+true_start.toString()+"\t位开始到第"+true_end.toString()+"\t位结束,最大值:"+rmax.toString()+"\t");
                         sis_s = rmax;
                     }
                     try {
                         Thread.sleep(1000);
                     } catch (InterruptedException e) {
                         // TODO 自动生成的 catch 块
                         e.printStackTrace();
                     }
                 }
             }

         }
         catch( NumberFormatException e){
             System.out.println("输入内容不是数字!");
             System.exit(0);
         }
         sc.close();
     }
     public static void FileMaker(BigInteger leng,BigInteger min,BigInteger max){
         File f = new File("data/data.txt");
         if(!f.exists())
         {
             try {
                 f.createNewFile();
             } catch (IOException e) {
                 //Do Nothing...
             }
         }
         PrintWriter pw = null;
         try {
             pw = new PrintWriter(f);
         } catch (FileNotFoundException e) {
             System.out.println("文件不存在！");
             System.exit(0);
         }
         Random ra = new Random(System.currentTimeMillis());
         BigInteger bi = new BigInteger("1");

         BigInteger sumL = max.subtract(min).add(BigInteger.ONE);

         while(bi.compareTo(leng)<=0)
         {
             long x = ra.nextLong();
             BigInteger bnum = new BigInteger(Long.toString(x));
             bnum = bnum.mod(sumL).add(min);
             pw.println(bnum.toString());
             bi = bi.add(BigInteger.ONE);
         }
         pw.close();
     }
     public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
         System.out.println("请输入数据量:");
         String str = sc.next();
         System.out.println("请输入数据范围:");
         String str1 = sc.next();
         String str2 = sc.next();
         System.out.println("确定是否查看关键步骤");
         boolean isKey = false;
         try{
             isKey = sc.nextBoolean();
             BigInteger leng = new BigInteger(str);
             BigInteger num1 = new BigInteger(str1);
             BigInteger num2 = new BigInteger(str2);
             if(num1.compareTo(num2)==0)
                 throw new Exception();
             else if(leng.compareTo(BigInteger.ZERO)<0)
                 throw new Exception();
             else
             {
                 if(num1.compareTo(num2)<0)
                     FileMaker(leng,num1,num2);
                 else
                     FileMaker(leng,num2,num1);
             }
         }catch(Exception e){
             System.out.println("爷爷！出现问题了！");
             System.exit(0);
         }

         if(!isKey)
             run();
         else
         {
             run();
             try{
                 int l = sc.nextInt();
                 run2(l);
             }catch (Exception e){
                 //Do Nothing...
             }
         }
         sc.close();
     }
 }

TestPlay6