编译失败的尝试，与资源

我用一个简单的尝试，与资源的语句如下所示：编译失败的尝试，与资源

try (final CSVWriter w = new CSVWriter(new OutputStreamWriter(r.getOutputStream(), "UTF-8"));){ 
    //do stuff...... 
}

它使用普通javac Ant任务编译罚款，但是当我有Clover首先编写代码，结果代码不再编译（请参阅下面的编译消息）。

According to the docs，这个版本的Clover确实支持Java 7.有没有其他人遇到这个问题或者有什么想法是什么问题？

Java版本：

 
java version "1.7.0" 
Java(TM) SE Runtime Environment (build pxi3270-20110827_01) 
IBM J9 VM (build 2.6, JRE 1.7.0 Linux x86-32 20110810_88604 (JIT enabled, AOT enabled) 
J9VM - R26_Java726_GA_20110810_1208_B88592 
JIT - r11_20110810_20466 
GC - R26_Java726_GA_20110810_1208_B88592 
J9CL - 20110810_88604) 
JCL - 20110809_01 based on Oracle 7b147

输出Ant任务：

 
compile: 
    [echo] Compiling source code... 
    [javac] Compiling 135 source files to /home/*********/WEB-INF/classes 
    [clover] Clover Version 3.1.2, built on November 07 2011 (build-842) 
    [clover] Loaded from: /home/*******/clover.jar 
    [clover] Clover: Commercial License registered to *******. 
    [clover] Updating existing database at '/home/********/dist/clover/clover.db'. 
    [clover] Processing files at 1.7 source level. 
    [clover] Clover all over. Instrumented 135 files (12 packages). 
    [clover] Elapsed time = 1.597 secs. (84.534 files/sec, 12,463.369 srclines/sec) 
    [javac] /tmp/clover2218935617827048125.tmp/com/****/web/DownloadService.java:232: error: illegal start of type 
    [javac]     __CLR3_1_24ae4aegwpi0zhh.R.inc(5592);try (new java.lang.AutoCloseable() {{__CLR3_1_24ae4aegwpi0zhh.R.inc(5593);}public void close(){}};CSVWriter w = new CSVWriter(new OutputStreamWriter(response.getOutputStream(), "UTF-8"));){

来源

2011-12-27 david

似乎using optional trailing semicolon to terminate resources list in try-with-resources不允许你的JDK版本，it's illegal under JSR 334。

入住此documentation：

语法：语法产生的对TryStatement在JLS§14.20现有集与扩充：

TryStatement: 
    try ResourceSpecification Block Catchesopt Finallyopt 

Supporting new grammar productions are added: 

ResourceSpecification: 
    (Resources) 
Resources: 
    Resource 
    Resource ; Resources 
Resource: 
    VariableModifiers Type VariableDeclaratorId = Expression 
    Expression

[合并语法的一个含义是，一试语句必须至少有一个catch子句，一个finally块和一个资源规范。此外，允许尝试声明具有这三个组件中的一个。 注意，它是非法拥有的资源规范尾随分号]

尝试删除最后一个分号。

try (final CSVWriter w = new CSVWriter(new OutputStreamWriter(r.getOutputStream(), "UTF-8"))){ 
//do stuff...... 
}

来源

2012-06-14 13:25:37

编译失败的尝试，与资源

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