使用getter setter增加int值 [英] Incrementing int value using the getter setter

问题描述

我要求增加int值。所以我为它做了getter / setter，我将这个逻辑应用于int的增量值：

I have a requirement to increment int value. So I have made getter/setter for it and I applied this logic for the increment value of int:

public class MyOrderDetails {

    private int count = 0;

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public void increment(int increment) {
        setCount(getCount() + 1);
    }

 }

这是正确的方式我是什么做或者这个在语法上是错误的吗？

Is this right way what I am doing or is this pro grammatically wrong?

推荐答案

a。如果您只想增加，则无需提供任何setter。

a. If you just want to increment, you don't need to provide any setter.

b。在

public void increment() {
    setCount(getCount() + 1);
}

你可以直接访问count变量，所以 count ++ 就够了，不需要setCount。

You can directly access the count variable, so count++ is enough, doesn't need to setCount.

c。通常需要重置方法。

c. Usually need a reset method.

d。 count ++不是原子的，所以如果它在多线程场景中使用则同步。

d. count++ is not atomic, so synchronize if it is used in multi-threading scenario.

public synchronized void increment() {
    count++;
}

所以最后这个课程将是：

So finally the class would be:

class Counter{
    private int count = 0;

    public int getCount(){
        return count;
    }

    public synchronized void increment(){
        count++;
    }

    public void reset(){
        count = 0;
    }
}

所以你可以使用类：

Counter counter = new Counter();
counter.increment() //increment the counter
int count = counter.getCount();

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