java enum用法获取和设置

Question

我在这里试图获取并在类对象中设置枚举,但不知道如何做到这一点.这就是我到目前为止所拥有的.我已经抬起头来,我可以看到一些看起来太复杂的例子让我无法理解.有什么帮助吗？

public class EnumExample {

public static class Task {

    private String _task;

    public enum Priority {

        ZERO (0), MAYBE (1), LOW (2), MEDIUM (3), HIGH (4), EXTREME (5);

        private int _priority;

        Priority() {
            _priority = 0;
            // Does this set set the default priority level to 0??
        }

        Priority(int priority) {
            _priority = priority;
            // This is where I can set the priority level of this task??
        }

        public int getPriority() {
            return _priority;
        }

        public void setPriority(int priority) {
            _priority = priority;
        }
    }
}



public static void main(String[] args) {

    Task task = new Task();
    task._task = "Study for test";
    System.out.println(task._task);
    System.out.println(task.getPriority());

    // How do I set the priority level for task "study for test"??
    // task.Priority = task.Priority.EXTREME;

    // How do I retrieve the value of priority??
    // System.out.println(task._task.getPriority());

}

}

Answer 1

您可以使用ordinal()枚举的方法来获取其位置.然后,您可以使用它来获取值优先级.

public class Task {

    private Priority priority = Priority.ZERO; // Default priority
    private String name = "";

    public enum Priority {
        ZERO, MAYBE, LOW, MEDIUM, HIGH, EXTREME;
    }

    public Task(String name) {
        this.name = name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
       return name;
    }

    public void setPriority(Priority p) {
        this.priority = p;
    }

    public Priority getPriority() {
        return priority
    }

    public static void main(String[] args) {
        Task t = new Task("Washing up");
        t.setPriority(Priority.HIGH);
        System.out.println(t.getName()); // Washing up
        System.out.println(t.getPriority().toString()); // This gets the string of HIGH
        System.out.println(t.getPriority().ordinal()); // this gives 4
    }
}