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[news.eclipse.newcomer] How can I set Eclipse to give me a warning on this error?

Hi,

Several times I have forgotten something like below:

public class MyClassA
{
	private MyClassB classB;
	private int A, B , C;
	
	public MyClassA()
	{
		A = 1;
		B = 2;
		C = 99;

//several times I forgot the following line. To my surprise, I was not warned by Eclipse. It took me a while to find out why my program is not working. How can I set Eclipse to give me a warning.
classB = new ClassB();


	}

	public void doIt()
	{
		classB.method1();
	}

}

Another class

public class Test
{
public static void main(String[] args)
{
MyClassA classA = new MyClassA();
classA.doIt(); //since I forgot to initialize classB inside MyClassA code, this won't work. And it is time consuming for me to find it out.


	}


}