主题：程序代码——要求用户输入5个数，最后打印平均值

使用数组的做法：
public class exec
{
        public static void main( String args[] ) throws Exception
        {
                int[] numarray=new int[5];
                
                for(int i=0;i<numarray.length;i++)
                {
                        String s=javax.swing.JOptionPane.showInputDialog("Please input the number("+(i+1)+"/"+numarray.length+")");
                        numarray=Integer.parseInt(s);
                }
                
                int amount=0;
                for(int i=0;i<numarray.length;i++)
                        amount=amount+numarray;
                
                String str=String.valueOf((double)amount/numarray.length);              
                javax.swing.JOptionPane.showMessageDialog(null,str);
                
                System.exit(0);
        }
}

不使用数组的做法：
public class exec
{
        public static void main( String args[] ) throws Exception
        {
                int amount=0;
                final int times=5;
                
                for(int i=0;i<times;i++)
                {
                        String s=javax.swing.JOptionPane.showInputDialog("Please input the number("+(i+1)+"/"+times+")");
                        amount=amount+Integer.parseInt(s);
                }
                
                
                String str=String.valueOf((double)amount/times);
                javax.swing.JOptionPane.showMessageDialog(null,str);
                
                System.exit(0);
        }
}