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This noncompliant code example consists of two classes: an immutable ImmutablePoint class and a mutable Holder class. Holder is mutable because a new ImmutablePoint instance can be assigned to it using the setPoint() method (see CON09-J. Do not assume that classes having only immutable members are immutablethread-safe).
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class Holder {
ImmutablePoint ipoint;
Holder(ImmutablePoint ip) {
ipoint = ip;
}
ImmutablePoint getPoint() {
return ipoint;
}
void setPoint(ImmutablePoint ip) {
this.ipoint = ip;
}
}
public class ImmutablePoint {
final int x;
final int y;
public ImmutablePoint(int x, int y) {
this.x = x;
this.y = y;
}
}
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