this inside a constructor, what does it do? [duplicate]

Question

this inside a constructor, what does it do? [duplicate]

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#1 by (5 votes)

4

Good, can someone tell me what this this does?

public Tempo (){
    this(0,0,0);
} 
public Tempo (int h){

    this(h,0,0);
}
public Tempo ( int h,int m){

    this (h,m,0);
}
public Tempo (int h,int m , int s){
    SetTime(h,m,s);

}

java

asked by anonymous 10.06.2017 / 12:04

1 answer

Difference hashmap and arraylist $ _GET get value from ID or name?

score 5 · Accepted Answer

The% construct of% inside the constructor serves to call another constructor.

In other words, this will call the constructor

public Tempo (int h,int m , int s){
    SetTime(h,m,s);
}

It can not be used in a conventional method and must be the first instruction inside the constructor, ie if you want to use it. It's just a way to keep the object initialization logic in just one of the constructors.