摘要：
String对象一旦被创建就不能被改变，而StringBuffer是可变的。这句话怎么理解？1.声明String对象String s = "abcd"; 2.将一个字符串变量赋值给另一个String变量String s2 = s; 3.字符串连接s = s.concat("ef"); // s... 阅读全文
摘要：
Analysis of Algorithms:First part of the course is focused on analysis.Second part of the course is focused on design.The analysis of algorithm is the... 阅读全文