Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我从 Java SE 5.0 for java 7 下载了带有差异的 jsl PDF - 并计划在我的暑假阅读它。有些段落是红色的,有些是蓝色的,有些是绿色的。我想这些是差异。他们的意思是什么 ?
颜色的含义如下: