private void Store() {
quotient_Float = posture_error/time;
if(value.getFloat("Value_Quotient", quotient_Float)==null || quotient_Float < value.getFloat("Value_Quotient", quotient_Float))
{
editor.putFloat("Value_Quotient", quotient_Float);
editor.commit();
}
}
float是原始数据类型,而不是对象. null检查用于对象.对于基元,您应该使用默认值检查.对于float,默认值为0.0f.
翻译自:https://stackoverflow.com/questions/18492432/in-java-how-do-you-check-if-a-float-variable-is-null