standardinputbyscanner.java

是<java程序设计>的课后作业2-8源码.可以供初学者参考,作了解java基础语法所用.

/**
 * @(#)StandardInputByScanner.java
 *
 *
 * @author 
 * @version 1.00 2009/3/21
 */
 
 import java.util.Scanner;

public class StandardInputByScanner {
        
    /**
     * Creates a new instance of <code>StandardInputByScanner</code>.
     */
    public StandardInputByScanner() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        
        /**使用scanner类从控制台读入*/
        Scanner scanner=new Scanner(System.in);
        
        int counter=0;
        double sum=0.0;
        
        while(scanner.hasNext())
        {
        	
        	String temp=scanner.next();
        	System.out.println(temp);
        	
        	
        	/**输入以$结束*/
        	if(!temp.equals("$"))
        	{
            sum+=Double.parseDouble(temp);
        	counter++;
        	}
        	
        	else
        	{
        		//scanner.close();
        		break;
        	}

        }
        
        
        
        double average=0.0;
        
        average=sum/counter;
        
        System.out.print("sum : "+sum+"\n"+"average : "+average+"\n");
    }
    
    
}