void sendMessage(){

System.out.println("screen:"=screen+"cpu:"=cpu+"mem:"=mem+"Telphone有打电话的功能");

}

为什么我输入这个就报错，只有引号里面的单词好像是成员变量，没打引号的就不是，这个如何解决？

报错内容：

Multiple markers at this line

- The left-hand side of an assignment must be a 

variable

- Syntax error, insert ")" to complete Expression

- Syntax error on token "+", ( expected after this 

token

- The left-hand side of an assignment must be a 

variable