Question

在我的驱动程序方法中：虽然在我的Storm.java文件中明确声明了setDuration，setWind，setPressure，NewStorm，getCategory，但是找不到它们。我无法提及他们中的任何一个。

import java.io.*;
import java.util.Scanner;

public class StormChaser {
public static void main(String[] args)
{
  // Constants
final int MAX_STORMS = 200;

Storm[] List = new Storm[MAX_STORMS]; // array of Storms
Storm CurrentStorm;      // storm returned by GetStorm
int NStorms = 0;         // number in array List
int Total = 0;           // total number of storms in the input file
Scanner fileInput;

   // Openning hurricane data file
   try{
    System.out.println("Openning hurricane data file...");
    fileInput = new Scanner(new File("hurricane.data"));
   }
   catch(FileNotFoundException e){
    System.err.println("FileNotFoundException: " + e.getMessage());
    return;
   }
   System.out.println( "File opened successfully...");
   System.out.println( "Reading file..." );


   // Read Storm data from file until EOF

   while( fileInput.hasNextLine()) 
   {
    CurrentStorm = GetStorm(fileInput);
       ++Total; 
    if( CurrentStorm.getCategory() >= 3 )
    {
            List[NStorms++] = CurrentStorm; 
    }
}
System.out.println( "Number of storms: " + Total);
System.out.println( "Hurricanes with category 3 and above: " + NStorms );
DisplayStorms( "First Ten Storms", List, 10 );
Sort( List, NStorms );
DisplayStorms( "Top Ten Storms", List, 10 );
fileInput.close();
}

public static Storm GetStorm( Scanner in ) 
{
   // Build a Storm object and return it

int year = 0, month = 0, day = 0, hour = 0, sequence = 0, wind = 0, pressure 
= 0;
String name = new String(); 
double junk = 0.0;
    int current = 0, beginDate = 0, duration = 0;
Storm NewStorm; 

    // Check for end of file
    if( !in.hasNextLine() )
    {
        NewStorm = new Storm(beginDate, duration, name, wind, pressure);
        return NewStorm;
    }       

// Read next record.
year = in.nextInt();
    month = in.nextInt();
    day = in.nextInt();
    hour = in.nextInt();
    sequence = in.nextInt();
    name =  in.next();
    junk = in.nextDouble();
    junk = in.nextDouble();
    wind = in.nextInt();
    pressure = in.nextInt();


    // Make a storm object and initialize it with info from the current 
record
    beginDate = year * 10000 + month * 100 + day;
    NewStorm = new Storm(beginDate, duration, name, wind, pressure);
    current = sequence;


    while( in.hasNextLine() && current == sequence) 
    {
        //update storm info
            duration += 6;
            NewStorm.setDuration(duration);
            NewStorm.SetWind(wind);
            NewStorm.setPressure(pressure);


        //get next record 

    }

   // and return the new storm object
   return NewStorm;
}

public static void DisplayStorms( String title, Storm[] List, int NStorms ) 
{
   // display NStorms storms
   // print some title and column headings
    System.out.println(title + "\n");
    System.out.println("Begin Date   Duration   Name   Category   Maximum    
Minimum");
    System.out.println("             (hours)                     Winds (mph) 
Press. (mb)");
    System.out.println("----------------------------------------------------
----
--------");
    for( int k = 0; k < NStorms; k++ )
        System.out.println(List[k].toString());
    System.out.println ("\n");
}

public static void Sort( Storm[] StormList, int N ) 
{
    // bubble sort the list of Storms
    int pass = 0, k, switches;
    Storm temp;
    switches = 1;
    while( switches != 0 ) 
    {
        switches = 0;
        pass++;
        for( k = 0; k < N - pass; k++ ) 
        {
            if( StormList[k].getCategory() < StormList[k+1].getCategory() )
            {
                temp = StormList[k];
                StormList[k] = StormList[k+1];
                StormList[k+1] = temp;
                switches = 1;
            }
        }
    }
}
}

这就是Storm.java。

public class Storm {
    private final double KnotsToMPH = 1.15;

// global user-defined types:
private int beginDate = 0;
private int duration = 0;
private String name;
private int category = 0;
private int wind = 0;
private int pressure = 0;

public Storm( int bdate, int dur, String sname, int w, int p )
{
beginDate = bdate;
setDuration(dur);
name = sname;
wind = 0;
pressure = 0;
setWind(w);
setPressure(p);
}

public void setDuration( int d )
{
duration = d;        
}

public void setWind( int w )
{
double temp = 0.0;       
temp = KnotsToMPH * w;
if(temp > wind)
    wind = (int)temp;
SaffirSimpson();

}

public void setPressure( int p )
{
if(pressure == 0)
    pressure = p;
if(pressure > p && p != 0)
    pressure = p;
SaffirSimpson();
}

public void SaffirSimpson()
{
// Compute storm category, using the Saffir-Simpson scale
if(pressure <= 920 && wind >= 156)
{
    category = 5;   // Category 5
}
if(pressure > 920 && wind < 156)
{
category = 4;   // Category 4
}
if(pressure > 945 && wind < 113)
{
    category = 3;   // Category 3
}
if(pressure > 965 && wind < 96)
{
    category = 2;   // Category 2
}    
if(pressure > 980 && wind < 83)
{
    category = 1;   // Category 1
}
if(wind < 64)
{
    category = -1;  // Tropical Storm
}    
if(wind < 34)
{
    category = -2;  // Tropical Depression
}
if(pressure == 0)
{
    category = 0;   // Missing pressure
}
}

public int getCategory()
{
return category;    
}

public String toString()
{
    return String.format("%9d %8d   %10s %4d %9d %10d\n", beginDate, 
duration, 
name, category, wind, pressure); 

}

}

我很确定它与NetBeans创建的默认构造函数有关，我只是不确定确切问题的位置..

Answer 1

Java区分大小写，SetWind与setWind

不同

Storm中的方法定义为setWind

public static class Storm {
    //...
    public void setWind(int w) {
        //...
    }
    //...
}

但您在代码SetWind

中使用NewStorm.SetWind(wind);

＆＃34;找不到符号：方法＆＃34;但是方法是在Storm.java中定义和声明的

1 个答案: