java - Assignments are by reference? -

java - Assignments are by reference? -

in java if do

myobj 1 = new myobj(); myobj 2 = one;

then 1 , 2 pointing same object.

in c++ if did:

myobj 1 = new myobj(); myobj *two = &one;

is same java example? wherein modifying either one or two effect both objects?

these create 1 , 2 same thing:

myobj *one = new myobj(); myobj *two = one; //one , 2 same thing, pointer's myobj myobj one; myobj *two = &one; //one object deallocated @ end of current scope //two pointer 1

in c++ new myobj() creates myobj on heap , returns pointer it.

myobj *one; //creates variable should point myobj instance myobj 2 = new myobj(); //doesn't work *two = &one; //get 2 point's @ , assign location of 1

update:

myobj 1 = new myobj(); //this doesn't quite work, assigning pointer class myobj *two = &one; //this works, create pointer point 1

to prepare first statement, use:

myobj 1 = myobj(); //myobj one(); //this requires constructor take arguments, juanchopanza! myobj one{}; //requires c++11, courtesy juanchopanza myobj one;

all same thing

generally, next should create copy:

myobj one; //or variant myobj 2 = one;

or if prefer utilize pointers:

myobj *one = new myobj(); myobj *two = new myobj(); *two = *one;

java c++ variable-assignment