ストラテジパターン

public enum MethodType {
    METHOD_A,
    METHOD_B
}

public interface MethodStrategy {
    void execute();
}

public class MethodAStrategy implements MethodStrategy {
    @Override
    public void execute() {
        // methodA の実装
    }
}

public class MethodBStrategy implements MethodStrategy {
    @Override
    public void execute() {
        // methodB の実装
    }
}

public class MethodExecutor {
    public static void execute(MethodType methodType) {
        MethodStrategy strategy;
        switch (methodType) {
            case METHOD_A:
                strategy = new MethodAStrategy();
                break;
            case METHOD_B:
                strategy = new MethodBStrategy();
                break;
            default:
                throw new IllegalArgumentException("Invalid method type: " + methodType);
        }
        strategy.execute();
    }
}

public class Test {
    public static void main(String[] args) {
        MethodExecutor.execute(MethodType.METHOD_A);
        MethodExecutor.execute(MethodType.METHOD_B);
    }
}