Question

I’m new to Java but experienced in C++. I came across some code that I didn’t understand:

public class SomeClass {
    private SomeOtherClass someOther = new SomeOtherClass();
    private AThirdClass thirdClass;

    SomeClass() {
        this.thirdClass = new AThirdClass();
    }
}

Why when there is only a single constructor would you have someOther initialized in the initialization and thirdClass initialized in the constructor?

Answer 1

The below is one reason you may wish to do that.

public class SomeClass { 
    private SomeOtherClass someOther = new SomeOtherClass(); 
    private AThirdClass thirdClass; 

    SomeClass( int x ) { 
        this.thirdClass = new AThirdClass( x ); 
    } 
} 

But that only explains why you would want to initialize thirdClass in the constructor. I am at a loss to explain why you would want to initialize someOther in the init block.