jdk新特性

发表于

jdk 7

try 语法使用

try后面跟（）括号，用来管理释放资源，try括号内的资源会在try语句结束后自动释放，前提是这些可关闭资源必须实现 java.lang.AutoCloseable接口

templet

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package com.download;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class WordCount {
    public static void main(String[] args) {
        try (
                InputStream in = new FileInputStream("");
                OutputStream out = new FileOutputStream("");
            )
        {
            byte[] buf = new byte[8192];
            int i;
            while ((i = in.read(buf)) != -1) {
                out.write(buf, 0, i);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}