Two constructor calls inside one constructor in Java -

suppose following situation:

class foo{       foo(i i, i1 i1){          super();         this(i);         ...     }      foo(i i){         super();         ...     } } 

java complains constructor call must first statement in constructor. cannot make 2 constructor calls first @ same time. there workaround wouldn't repeating code of one-argument constructor inside 2 argument constructor?

yes, mentioned in comment , don`t need call super(). how works in java ?

if don`t write constructor, java write to you, when compiling code , inserting:

public class apple{ public apple(){ // injected java,    super();  // object class } 

if write constructor, don`t add java replace yours:

public class apple{ public apple(){    super();  // added java, during compiling } 

if write own:

public class apple{ public apple(){    // init things , make world better place } 

in case java don`t insert anything, super(); because need call object class well. so, super(); there @ cost.

if have multiple constructor calls, this() , java add super(); // object class call @ top of constructor.

sources: https://docs.oracle.com/javase/tutorial/java/iandi/super.html https://docs.oracle.com/javase/tutorial/java/iandi/objectclass.html , http://www.amazon.co.uk/programmer-study-1z0-803-1z0-804-oracle/dp/0071772006/ref=sr_1_1?s=books&ie=utf8&qid=1435233062&sr=1-1&keywords=ocjp