unable to retrieve value of list from one method to another

I have ids in a list inside a method called displayid(). I use getters and setters. When try to retrieve the ids from another method Mid(), i am unable to retrieve all values. Only last value is printed. Here is my code

void displayId(PrintWriter stdOut, StringResources resources, IPatchBundle group){
    List ids = new ArrayList();
    String MIds=spec.getId();
    ids.add(MIds);
    ar.setMid(ids);
    System.out.println("M Ids of specific group "+MIds);                          
}

Outp开发者_如何学运维ut:

M Ids of specific group M05632s
M Ids of specific group M05633s
M Ids of specific group M05634s

Code:

public boolean cmdMId(InputStream stdIn, PrintWriter stdOut, StringResources resources, Arguments args, Object data){
    List ids=new ArrayList();
    ids.add(ar.getMid());
    System.out.println("ar.getMid()=======>"+ar.getM());
    return true;
}

Output: //Here i need all the three values but i get only the last value ar.getMid()=======>M05634s

Getter setter

public List getMid(){
    return mid;
}

public void setMid(List mid){
    this.mid=mid;
}

Please help me to solve this

What is spec.getId(); how many Ids does it give?

You have to run the part:

String MIds=spec.getId();
ids.add(MIds);

for all three Ids, i guess you add only the last one, you can check this buy setting a breakpoint and look how many times do you access the ids.add() methode.