如何从整数JAVA中删除小数点

Question

我正在尝试删除代码通过数字512运行时的小数点，但将其他数字保留在小数点后。我已经尝试过使用if语句和字符串格式化方法，但不幸的是到目前为止，什么都没有起作用。

 public class Main                                                      
{                                                       
 public static void main(String[] args)                                                     
 {                                                      
  System.out.println(Challenge.formatAsMemory(512));                                                        
  System.out.println(Challenge.formatAsMemory(1536));
 }
}

public class Challenge                                                      
 {                                                      
   public static String formatAsMemory(long bytes)                                                      
  {                                                     
    double newNum = bytes;                                                      
    if(newNum < 1048576){                                                       
      newNum = newNum/1024;                                                     
    }else if(newNum < 3048576){                                                     
     newNum = newNum/1048576;                                                       
    }else if(newNum < 1632087573){                                                      
     newNum = newNum / 1073741824;                                                      
    }else if (newNum < 13421772801L){                                                       
     newNum = newNum / 1073741824;                                                      
    }else if(newNum < 23412048474L){                                                        
     newNum = newNum / 1073741824;                                                      
    }else if(newNum < 1231453023110L){                                                      
     newNum = newNum / 1073741824;                                                      
     newNum = newNum / 1024;                                                        
   }                                                        
   String numberAsString = String.format ("%.2f", newNum);                                                      

   double number = Double.parseDouble(numberAsString);                                                      
   if (number == 0.50){                                                     
   number = 512;                                                        
   }                                                        
   String answer = Double.toString(number);                                                     
   return answer;                                                       
 }                                                      

Answer 1

这将根据您的描述起作用

if (number == 0.50){                                                     
    return "512";                                                        
}