如何检索JRI结果与R终端相同

Question

当我在R终端中尝试以下内容时

library(MASS)
school.fre = painters$School
school.fre = table(school)
cbind(school.fre)

我得到以下结果

> cbind(school.fre)
  school.fre
A         10
B          6
C          6
D         10
E          7
F          4
G          7
H          4

但是当我在JRI应用程序中尝试这个时

Rengine re = new Rengine(args, false, new MyTextConsole());
REXP x;
        re.eval("library(MASS)");
        re.eval("school = painters$School");
        re.eval("school.freq = table(school)");
        x = re.eval("school.freq");
        System.out.println("school.freq::"+x);

        x = re.eval("cbind(school.freq)");
        System.out.println("\n\ncbind(school.freq)::"+x);

这就是我得到的

school.freq::[INT* (10, 6, 6, 10, 7, 4, 7, 4)]

cbind(school.freq)::[INT* (10, 6, 6, 10, 7, 4, 7, 4)].

我该如何检索结果的第一列（A，B，C ..）？

声明re.eval("barplot(school.freq)");生成的条形图也很快就消失了。

我非常感谢这方面的任何指导和教程链接，因为我是JRI的新手。