集册 Java实例教程 在finally语句中关闭作家

在finally语句中关闭作家

欢马劈雪     最近更新时间:2020-01-02 10:19:05

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在finally语句中关闭作家

import java.io.*;

import java.util.List;//nowjava.com

import java.util.ArrayList;


public class ListOfNumbersTest {

    public static void main(String[] args) {

        ListOfNumbers list = new ListOfNumbers();

        list.writeList();

    }

}


class ListOfNumbers {

    private List<Integer> list;

    private static final int SIZE = 10;


    public ListOfNumbers() {

        list = new ArrayList<Integer>(SIZE);//来 自 时代Java

        for (int i = 0; i < SIZE; i++)

            list.add(new Integer(i));

    }


    public void writeList() {

        PrintWriter out = null;


        try {

            System.out.println("Entering try statement");

            out = new PrintWriter(new FileWriter("OutFile.txt"));


            for (int i = 0; i < SIZE; i++)

                out.println("Value at: " + i + " = " + list.get(i));

        } catch (IndexOutOfBoundsException e) {

            System.err.println("Caught IndexOutOfBoundsException: "

                    + e.getMessage());

        } catch (IOException e) {

            System.err.println("Caught IOException: " + e.getMessage());

        } finally {

            if (out != null) {

                System.out.println("Closing PrintWriter");

                out.close();

            } else {

                System.out.println("PrintWriter not open");

            }

        }

    }

}


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