やさしさがうれしい meaning


I came across this phrase example in my grammar book, but I don't know if I
fully understand the meaning.

> 留学したとき、クラスの友達のやさしさがとてもうれしかった。

Can やさしさ be described as うれしい?  
And what does that exactly mean?




やさしさがうれしい means "to be glad about kindness". That is "She(He) was glad about
her(his) classmates' kindness".

