Question

Define the constructor and methods for a class with the following signature: public pair(thetype aval, thetype bval) to initialize public fields firstval to aval and secondval to bval.

Answer 1

A pair class is a useful data structure that stores two values together. In Java, you can define a pair class with a constructor and methods to initialize and access the values. The class uses a type parameter to accommodate different data types.

Step-by-step explanation:

A pair class is a useful data structure that stores two values together. In Java, you can define a pair class with a constructor and methods as follows:

public class Pair<T> {
private T firstVal;
private T secondVal;

public Pair(T aval, T bval) {
firstVal = aval;
secondVal = bval;
}

public T getFirstVal() {
return firstVal;
}

public T getSecondVal() {
return secondVal;
}

public void setFirstVal(T aval) {
firstVal = aval;
}

public void setSecondVal(T bval) {
secondVal = bval;
}
}

In this example, the pair class has two private fields, firstVal and secondVal, which store the values passed to the constructor. It also has getter and setter methods to access and modify the values. The type parameter T allows the pair class to be used with any data type.