Java 如何清除android中的int []数组？
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How to clear int[] array in android?
提问by Reshmin
I have an example that calculates total expense and income. There are some values in integer array that converted from a string array. Once I am running the code the sum is 6000 and running again the same code the sum gets multiplied to 12000. How can I override this problem. Please check my code given below..
我有一个计算总费用和收入的例子。整数数组中有一些值是从字符串数组转换而来的。运行代码后，总和为 6000，再次运行相同的代码，总和将乘以 12000。如何解决此问题。请检查我下面给出的代码..
public static int incSum=0;
int[] numbersinc = new int[theAmount.length];
for(int i=0;i<theAmount.length;i++)
{
numbersinc[i]=Integer.parseInt(theAmount[i]);
incSum=incSum+numbersinc[i];
}
Log.e("SUM INC","Sum Inc= "+incSum); <<<<<- This sum is multiplying
采纳答案by Himanshu Agarwal
You can simply assign nullto the reference. (This will work for any type of array, not just ints)
您可以简单地分配null给参考。（这适用于任何类型的数组，而不仅仅是ints）
int[] arr = new int[]{1, 2, 3, 4};
arr = null;
This will 'clear out' the array. You can also assign a new array to that reference if you like:
这将“清除”阵列。如果您愿意，您还可以为该引用分配一个新数组：
int[] arr = new int[]{1, 2, 3, 4};
arr = new int[]{6, 7, 8, 9};
If you are worried about memory leaks, don't be. The garbage collector will clean up any references left by the array.
如果您担心内存泄漏，请不要担心。垃圾收集器将清除数组留下的任何引用。
Another example:
另一个例子：
float[] arr = ;// some array that you want to clear
arr = new float[arr.length];
This will create a new float[]initialized to the default value for float.
这将创建一个新的float[]初始化为 float 的默认值。
So in your code try this:
所以在你的代码中试试这个：
public int incSum=0;
int[] numbersinc = new int[theAmount.length];
incSum = 0; //add this line
for(int i=0;i<theAmount.length;i++)
{
numbersinc[i]=Integer.parseInt(theAmount[i]);
incSum=incSum+numbersinc[i];
}
Log.e("SUM INC","Sum Inc= "+incSum); <<<<<- This sum is multiplying
numbersinc = null;
回答by Amit Kumar
public static int incSum=0;
your variable is staticso when you run again then previous value store in incSumvariable .
static当您再次运行时，您的变量是如此，然后将先前的值存储在incSum变量中。
Remove staticfrom incSum
删除static从incSum
