不能将eclipse项目投射到IJavaProject

问题描述

我有以下代码

    IJavaProject targetProject = null;
    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
    for (IProject project : root.getProjects()) {
        if (project.getName().equals(projName)) {
            try {
                if (project.hasNature("org.eclipse.jdt.core.javanature")) {
                    targetProject = (IJavaProject) project;
                }
            } catch( ... ) {
             // etc ...
            }

我想要做的是基本上返回一个与特定名称匹配的项目作为IJavaProject。正如你所看到的，我检查确保有关的项目具有java性质，通过调用：

What I am trying to do is essentially return a project that matches a particular name as an IJavaProject. As you can see, I check to ensure that the project in question has a java nature by calling:

if (project.hasNature("org.eclipse.jdt.core.javanature")) {

唉，我得到一个' ClassCaseException'说明

Alas, I get a 'ClassCaseException' stating

java.lang.ClassCastException:
    org.eclipse.core.internal.resources.Project cannot be cast to org.eclipse.jdt.core.IJavaProject

任何想法为什么？我会想到，一旦IProject具有java性质，它可以被转换为IJavaProject。当服务不可用时，我无法访问JDT Core API。。

Any idea why? I would have thought that once an IProject has a java nature, it can be cast to a IJavaProject. I can't get access to the JDT Core API at the moment as the service is unavailable here.

推荐答案

您的答案中的代码不应该工作（打字错误？）。以下是如何创建IJavaProject：

The code in your answer shouldn't work (typo?). Here is how you can create an IJavaProject:

import org.eclipse.jdt.core.JavaCore
...
    if (project.hasNature(JavaCore.NATURE_ID)) {
        targetProject = JavaCore.create(project);
    }

IProject 键入Eclipse Resources API，IJavaProject是Eclipse Java Model中的一种类型。它们不一样的抽象，但所有的IJavaProjects都有一个IProject。

IProject is a type in the Eclipse Resources API and IJavaProject is a type in the Eclipse Java Model. They are not the same abstractions, but all IJavaProjects have an IProject.

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