boolean divisibleby10（int x）的问题 [英] Issue with boolean divisibleby10(int x)

问题描述

我的问题是我可以整除10个声明。我应该检查一个数组中的数字是否可以被10整除。但由于某种原因，它出现了，因为错误的数字可以被10整除。我实际上把它设置为一个int，但后来不得不改变它int到布尔值。



我尝试过：



< pre lang =java> package journal.pkg5a;

/ * *
*
* @author stephenwessels
* /
import javax.swing。*;
import java.util.Random;
public class Journal5A
{

public int [] createArray（ int size）
{

Random rnd = new Random（）;
int [] array = new int < /跨度> [大小];

for （ int i = 0 ; i< array.length; i ++）
array [i] = rnd.nextInt（ 101 ）;
return 数组;
}

public void printArray（）
{
Journal5A c = new Journal5A（）;
int [] myArray = c.createArray（ 10 ）;


for （ int i = 0 ; i< myArray.length; i ++）
{
System.out.println（myArray [i]）;
System.out.println（ 有 + c.divisibleby10（i）+ 可被10整除的数字）;
}
}
public boolean divisibleby10（ int x）
{
return x％ 10 == 0 ？真假;
}
/ * *
* @param args命令行参数
* /
public static void main（ String [] args）
{
Journal5A c = 新 Journal5A（）;
随机r = 新 Random（）;


c.printArray（）;
}
}

解决方案

尝试

  import  java.util.Random; 
  public   class  Journal5A 
 {
 
  public   int  [] createArray（ int  size）
 {
 
 Random rnd =  new  Random（）; 
  int  [] array =  new   int < /跨度> [大小]; 
 
  for （ int  i =  0 ; i< array.length; i ++）
 array [i] = rnd.nextInt（ 101 ）; 
  return 数组; 
} 
 
  public   void  printArray（）
 {
  int  [] myArray = createArray（ 10 ）; 
 
  int  count =  0 ; 
 
  for （ int  i =  0 ; i< myArray.length; i ++）
 {
  boolean  isDivisible = divisibleby10（myArray [i]）; 
  if （isDivisible）
 {
 System.out.printf（ ％d可被10 \ n，myArray [i]）整除; 
 ++ count; 
} 
  else  
 System.out.printf（ < span class =code-string>％d不能被10 \ n，myArray [i]）整除; 
} 
 System.out.printf（ 有％d个数字可被10整除\ n，伯爵）; 
} 
  public   boolean  divisibleby10（ int  x）
 {
  return  x％ 10  = =  0 ; 
} 
  public   static   void  main（ String  [] args）
 {
 Journal5A c =  new  Journal5A（）; 
 c.printArray（）; 
} 
} 

I'm having an issue with my divisible by 10 statement. I'm supposed to have it check if a number in an array is divisible by 10. But for some reason it comes out as false numbers are divisible by 10. I actually had it set as an int but then had to change it from an int to a boolean.

What I have tried:

package journal.pkg5a;

/**
 *
 * @author stephenwessels
 */
import javax.swing.*;
import java.util.Random;
public class Journal5A 
{
    
public int[] createArray(int size) 
{

    Random rnd = new Random();
    int[] array = new int[size];
    
    for(int i = 0; i < array.length; i++) 
        array[i] = rnd.nextInt(101);
        return array; 
}

public void printArray() 
{
    Journal5A c = new Journal5A();
    int[] myArray = c.createArray(10);
    

    for(int i = 0; i < myArray.length; i++) 
    {
        System.out.println(myArray[i]);
        System.out.println("There is " + c.divisibleby10(i) + " numbers that are divisible by 10");
    }
}
  public boolean divisibleby10(int x) 
  {
    return x % 10 == 0 ? true : false;
  }   
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        Journal5A c = new Journal5A();
        Random r = new Random();
        

        c.printArray();
    }
}

解决方案

Try

import java.util.Random;
public class Journal5A
{

  public int[] createArray(int size)
  {

    Random rnd = new Random();
    int[] array = new int[size];

    for(int i = 0; i < array.length; i++)
      array[i] = rnd.nextInt(101);
    return array;
  }

  public void printArray()
  {
    int[] myArray = createArray(10);

    int count = 0;

    for(int i = 0; i < myArray.length; i++)
    {
        boolean isDivisible = divisibleby10(myArray[i]);
        if ( isDivisible )
        {
          System.out.printf("%d is divisible by 10\n", myArray[i]);
          ++count;
        }
        else
          System.out.printf("%d is not divisible by 10\n", myArray[i]);
    }
    System.out.printf("There are %d numbers that are divisible by 10\n", count);
  }
  public boolean divisibleby10(int x)
  {
    return x % 10 == 0;
  }
  public static void main(String[] args)
  {
    Journal5A c = new Journal5A();
    c.printArray();
  }
}

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