简单的代码优化

	@Override
	public Project getProject(int project_id) {
		Project project = null;
		if (projects.containsKey(project_id))
			project = projects.get(project_id); 
		return project;
	}

　　

简化：

    @Override
    public Project getProject(int project_id) {        
        return projects.get(project_id); 
    }

 

 

看看，有问题吗