将参数引入java输入输出方法

Question

我试图将两个数组和一个整数从另一个方法引入到写入文件的方法中。我试着用论据来解释，但没有用。希望你能帮忙

这是我如何传递参数从方法持有arry信息。

write (NameX, ScoresArray, players); /

此方法旨在使用传递的数组参数创建文件。

public static void write (String NameX [], int ScoresArray [], int players ) throws IOException 
{
    PrintWriter outputStream = new PrintWriter(new FileWriter("Genius.txt"));


    outputStream.println(players);

    for (int i = 0; i < NameX.length; i++)
    {
            outputStream.println(NameX[i] + ScoresArray [i] );
    }

    outputStream.close();



}

这是读取文件的方法

public static void reads () throws IOException 
{
    BufferedReader inStream = new BufferedReader(new FileReader("Genius.txt"));

    // Read in first file entry as an integer - the number of names stored       
    int players = Integer.parseInt(inStream.readLine());
    System.out.println(players);

    // Create an array big enough
    String [] NameX = new String[players];
    String [] ScoresArray = new String[players];

    // Now read in the names
    for (int i = 0; i < NameX.length; i++)
    {
        NameX[i] = inStream.readLine();
        ScoresArray[i] = inStream.readLine();

        System.out.println(NameX[i]);
        System.out.println(ScoresArray[i]);
    }

    inStream.close();



}

请你能告诉我哪里出了问题，我如何创建一个文件，保存数组并稍后读取文件。

*************编辑代码********************

    write(NameX,ScoresArray,players);
   reads();
    }


}//end of league table


public static void write (String NameX [], int ScoresArray [], int players ) throws IOException 

{

PrintWriter outputStream = new PrintWriter(new FileWriter("Genius.txt"));


outputStream.println(players);

for (int i = 0; i < NameX.length; i++)
{
        outputStream.println(NameX[i] +":"+ ScoresArray [i] );
}

outputStream.close();

}公共静态无效读取（）抛出IOExcense{BufferedReader inStream=new BufferedReader（new FileReader（"Genius.txt"））；

// Read in first file entry as an integer - the number of names stored       
int players = Integer.parseInt(inStream.readLine());
System.out.println(players);

// Create an array big enough
String [] NameX = new String[players];
String [] ScoresArray = new String[players];

// Now read in the names
for (int i = 0; i < NameX.length; i++)
{
    String str = inStream.readLine();
    String vals[] = str.split(":");
    System.out.println(vals[0]+"   "+vals[1]);
}

inStream.close();

}

我还是有同样的问题

Answer 1

也许您可以尝试使用java.lang.异常，而不是IOExcture，使用异常应该涵盖可能引发的所有类型的异常。

public static void write (String NameX [], int ScoresArray [], int players ) throws Exception
{
    PrintWriter outputStream = new PrintWriter(new FileWriter("Genius.txt"));
    outputStream.println(players);

    for (int i = 0; i < NameX.length; i++){
        outputStream.println(NameX[i] + ScoresArray [i] );
    }

    outputStream.close();
}

然后使用：

try {
   write (NameX, ScoresArray, players); //
}catch(IOException io){
    //Handle an IO exception
}catch(Exception e){
    //Handle Exception
}

恐怕我还没有时间来测试这个。

Answer 2

好吧，我希望你正在寻找这个：

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package test;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

/**
 *
 * @author manoj.sharma
 */
public class Test {

    /**
     * @param args the command line arguments
     */

    public static void write (String NameX [], int ScoresArray [], int players ) throws IOException 
{
    PrintWriter outputStream = new PrintWriter(new FileWriter("Genius.txt"));


    outputStream.println(players);

    for (int i = 0; i < NameX.length; i++)
    {
            outputStream.println(NameX[i] +":"+ ScoresArray [i] );
    }

    outputStream.close();



}
  public static void reads () throws IOException 
{
    BufferedReader inStream = new BufferedReader(new FileReader("Genius.txt"));

    // Read in first file entry as an integer - the number of names stored       
    int players = Integer.parseInt(inStream.readLine());
    System.out.println(players);

    // Create an array big enough
    String [] NameX = new String[players];
    String [] ScoresArray = new String[players];

    // Now read in the names
    for (int i = 0; i < NameX.length; i++)
    {
        String str = inStream.readLine();
        String vals[] = str.split(":");
        System.out.println(vals[0]+"   "+vals[1]);
    }

    inStream.close();



}  
    public static void main(String[] args) {
        String [] names={"manoj","kushal"};
        int [] scores = {10,20};
        int p = 2;
       try{
       write(names,scores,p);
       reads();
      } catch(IOException e){System.out.println(e.getMessage());}

    }

}

我希望你已经找到了解决办法。

Answer 3

IOException是一个选中的异常，你的函数write（NameX，ScoresArray，players） 是抛出的IOException。所以你应该及时处理。

try {
   write (NameX, ScoresArray, players); //
}catch(IOException ie){
  // do operation 
}

有关更多详细信息，请参阅：教训：异常