I wonder if it's possible to store lambdas in some container, for ex. ArrayList or HashMap. I want to change that code:
public enum OPCODE implements BinaryOperator<Integer> {
MOV((x, y) -> y),
INC((x, y) -> ++x),
DEC((x, y) -> --x),
ADD((x, y) -> x + y),
SUB((x, y) -> x - y);
private final BinaryOperator<Integer> binaryOperator;
OPCODE(BinaryOperator<Integer> binaryOperator) {
this.binaryOperator = binaryOperator;
}
@Override
public Integer apply(Integer integer, Integer integer2) {
return binaryOperator.apply(integer, integer2);
}
}
To something like:
List<BinaryOperator<Integer>> opcodes = new ArrayList<BinaryOperator<Integer>>(){
((x, y) -> y),
((x, y) -> ++x)
};
etc.
and use it like so:
opcodes[0].apply(a, b);
It is even possible?
You can certainly create such a list as:
List<BinaryOperator<Integer>> opcodes = Arrays.asList((x, y) -> y, (x, y) -> ++x);
// sample
int a=14,b=16;
System.out.println(opcodes.get(0).apply(a, b)); // prints 16
System.out.println(opcodes.get(1).apply(a, b)); // prints 15
Or redressing the way you were trying to initializing the list
List<BinaryOperator<Integer>> opcodes = new ArrayList<BinaryOperator<Integer>>() {{
add((x, y) -> y);
add((x, y) -> ++x);
add((x, y) -> --x);
add((x, y) -> x + y);
add((x, y) -> x - y);
}};