I’m just learning Java and trying to have an array of a class. When a call a methed from the array it crashes. Works fine if it is not an array
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
cDate test=new cDate();
test.setDay(0);
mAppoitments = new cDate[24];
// crashes why?????
mAppoitments[0].setDay(0);
You haven't filled your array with objects. You have to:
cDate[0] = test;
Otherwise you have null at index 0, and you cannot invoke anything on null.
And next time you ask a question, give all needed details:
You have an array of 24 objects, each of which is set to null. You need to initialize each one before you can call methods on it.
You have initialized the array but not the objects in the array. Try initializing these elements before using them.
mAppoitments = new cDate[24];
for (int i = 0; i < mAppoitments.length; i++)
mAppoitments[i] = new cDate();
mAppoitments[0].setDay(0);
final int COUNT= 24;
mAppoitments = new cDate[COUNT];
for(int i = 0 ; i < COUNT ; ++i) {
mAppoitments[i] = new cDate();
mAppoitments[i].setDay(0);
}
cDate myAppointments = new cDate[24];
try declaring the variable type
null references.