Array is nullArray is not nullElement is nullElement is not nullValue foundValue not foundStartCheckValueArrayNullArrayNotNullStopIterateArrayCheckElementElementNullElementNotNullContinueValueFoundValueNotFound 序列图 下面是一个序列图,展示了判断某个值是否在数组中为null的过程: CheckValueValueToCheckArrayC...
NOT_CHECKEDCHECKINGVALID|elementisnotNULLINVALID 异常检测 在任何编程中,异常检测都是不可或缺的一部分。以下代码段展示了如何对数组进行检查并捕获潜在的异常: publicclassArrayChecker{publicstaticbooleanareAllElementsNonNull(Object[]array){for(Objectelement:array){if(element==null){returnfalse;}}returntrue;}...
We are given an array and element.Our goal is to check if array contains the element. For instance, given an array[PowerShell", "Java", "PHP"], we want to check if the string"Java"is an element of this array. This simple query opens up a range of important considerations such as ...
String nullString =null; String emptyString =""; String blankString =" "; In this tutorial, we'll look athow to check if a String is Null, Empty or Blank in Java. Using the Length of the String As mentioned before, a string is empty if its length is equal to zero. We will be...
*@paramarray the array to check*/publicstaticbooleanisEmpty(Object[] array) {return(array ==null|| array.length == 0); } /*** Check whether the given array contains the given element. *@paramarray the array to check (may be {@codenull}, ...
return next; } catch (IndexOutOfBoundsException e) { checkForComodification(); throw new NoSuchElementException(); } } /** * 移除上一次调用 next() 方法返回的元素 */ public void remove() { if (lastRet < 0) throw new IllegalStateException(); checkForComodification(); try { AbstractList...
JSONArray jsonArr = (JSONArray)json; int len = jsonArr.size(); for (int i = 0; i < len; ++i) { // TODO: do something here jsonArr.set(i, traverseJson(jsonArr.get(i))); } // return retArr; // // } else {// if json is just a raw element ...
privatevoidgrow(intminCapacity) {// 记录旧的lengthintoldCapacity=elementData.length;// 扩容1.5倍, 位运算符效率更高intnewCapacity=oldCapacity+ (oldCapacity>>1);// 判断是否小于需求容量if (newCapacity-minCapacity<)newCapacity=minCapacity;// 判断有没有超过最大的数组大小if (newCapacity-MAX_ARRAY_...
publicEremove(intindex){checkElementIndex(index);returnunlink(node(index));}Eunlink(Node<E>x){finalEelement=x.item;finalNode<E>next=x.next;finalNode<E>prev=x.prev;if(prev==null){first=next;}else{prev.next=next;x.prev=null;}if(next==null){last=prev;}else{next.prev=prev;x.next=nu...
public final class Class<T> implements java.io.Serializable,GenericDeclaration,Type,AnnotatedElement {private static final int ANNOTATION= 0x00002000;private static final int ENUM = 0x00004000;private static final int SYNTHETIC = 0x00001000;private static native void registerNatives();static {registerNa...