我有一个由多个对象组成的列表，我想将该列表中的两个对象与基于常见 object 值的分隔符连接起来？

Question

//I have a list:
List<StudentClass> res = new ArrayList<>();

//res looks like this:
 "StudentClass(ob1= 1234, ob2= "random", ob3= "abc")"
 "StudentClass(ob1= 1234, ob2= "something", ob3= "def")"
 "StudentClass(ob1= 567, ob2= "xyzzy", ob3= "yyy")"

块引用

基于常见的object ob1，我想用分隔符“，”组合ob3

//Expected output of res:
 "StudentClass(ob1= 1234, ob2= "random", ob3= "abc,def")"
 "StudentClass(ob1= 567, ob2= "xyzzy", ob3= "yyy")"