listofnumbersdeclared.java

电子工业出版社出版的《java2应用开发指南》配套光盘源代码

//【代码10-4-2】
// ListOfNumbersDeclared.java
import java.io.*;
import java.util.Vector;

class ListOfNumbers 
{
    private Vector victor;
    private static final int size = 10;

	//构造方法
	public ListOfNumbers () 
	{
			//创建向量类
	        victor = new Vector(size);
			//向向量中增加元素
	        for (int i = 0; i < size; i++)
	            victor.addElement(new Integer(i));
	}
	//成员方法，抛出两种类型的异常
	public void writeList() throws IOException, ArrayIndexOutOfBoundsException
	{
		//文件IO处理
        PrintStream out = new PrintStream(
			      new FileOutputStream("OutFile.txt"));
        //取得向量元素
        for (int i = 0; i < size; i++)
            out.println("Value at: " + i + " = " + victor.elementAt(i));
		//关闭输出流
        out.close();
    }
}

public class ListOfNumbersDeclared 
{
	public static void main(String[] args) 
	{
		//实例化对象
		ListOfNumbers list = new ListOfNumbers();
		try{
			//调用方法
			list.writeList();
		}
		catch( Exception e)
		{
			//打印出异常的栈跟踪
			e.printStackTrace();
		}
    }
}