为什么eclipse会编译shell javac或mvn会产生错误的文件：代码太大？ [英] Why eclipse compiles a file that shell javac or mvn produces an error: code too large?

问题描述

环境：

• Eclipse luna


• maven 3.2。 3


• java 7

我见过问题，但我不明白的是为什么eclipse可以编译此文件，而我们却无法

I've seen questions like this but what I don't understand is why eclipse can compile this file and we aren't able to do it through the shell.

我也知道这个文件必须是属性文件，但这是我在项目中找到的。

I also know that this file it would have to be a properties file but it is what I found in a project.

Eclipse编译文件并创建字节码Messeges.class，但是javac和mvn都不能这样做，因为错误：代码太大。

Eclipse compiles de file and create the bytecode Messeges.class, but neither javac nor mvn could do that because the error: code too large.

此文件Messages.java是具有3232行的枚举，并用作将其加载到内存中的属性。它具有大约3100个不同的元素。

This file Messages.java is an enum that has 3232 lines and is used as a properties to load al this in memory. It has about 3100 different elements.

Messages.java

public enum Messages {
  MENU_MANAGEMENT("Management menu"),
  ...3100..
  MENU_OTHER("Other");

  private String name;

  private Messages(String name) {
    this.name = name;
  }
  ...
}

错误

$javac Messages.java
Messages.java:11: error: code too large
        MENU_MANAGEMENT("Management menu"),
        ^
1 error

eclipse如何或为什么编译它？我不明白日食如何做到？？

推荐答案

当枚举常量的数量大于2000时，eclipse会生成综合方法来解决代码大小限制。

When the number of enum constants is higher than 2000, eclipse generates synthetic methods to work around the code size limit.

请参见 https://bugs.eclipse.org/bugs/show_bug.cgi?id=331334

BTW ：在您的Maven构建中切换为ecj并不是长期解决方案：该解决方案仅在Java 9之前有效，因为自 https://bugs.java.com/view_bug.do?bug_id=JDK-8157181

BTW: Switching to ecj as compiler in your maven build isn't a long term solution either: This solution only works before Java 9, because initializing a final field outside initialization methods is disallowed since https://bugs.java.com/view_bug.do?bug_id=JDK-8157181

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