27 lines
733 B
Java
27 lines
733 B
Java
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class Task {
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void executeTask() {
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System.out.println("Task is being executed");
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}
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}
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class NonNumericTypeException extends Exception {
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NonNumericTypeException(String msg) {
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super(msg);
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}
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}
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class SumTask<T extends Number> extends Task {
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synchronized T sum(T a, T b) throws NonNumericTypeException {
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if (a == null || b == null) throw new NonNumericTypeException("Non-numeric type");
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return (T) Double.valueOf(a.doubleValue() + b.doubleValue());
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}
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}
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public class Main {
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public static void main(String[] args) throws NonNumericTypeException {
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SumTask<Double> task = new SumTask<>();
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task.executeTask();
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System.out.println(task.sum(3.0, 4.0));
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}
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}
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