ArraySwapMainUserArraySwapMainUserRun programCall swap(arr, 1, 3)Check index validitySwap elementsReturnOutput result 五、执行结果 运行上述代码,将会得到如下输出: Before swap: [1, 2, 3, 4, 5] After swap: [1, 4, 3, 2, 5] 1. 2. 六、时空复杂度分析 这个swap操作的时间复杂度为 O(1),...
// display Array List before swap System.out.println("Before Swap the ArrayList "); System.out.println(ArrList); // Swapping the elements at 1 and 2 indices Collections.swap(ArrList,1,2); // display Array List after swap System.out.println("After Swap the ArrayList"); System.out.print...
The Vector is a flexible array that can grow or shrink as needed, making it an important data structure for this purpose. In Java, Vectors are especially useful because they allow you to store different types of objects together.In this guide, we'll learn to swap elements in a Vector in...
API---Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store the list. ...
in the destination data. * @param length the number of array elements to be copied. ...
void TypeArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) 注意打断点的技巧,底层函数会被很多地方调用,要找到关注的堆栈可以用值匹配 b TypeArrayKlass::copy_array if (src_pos79&&length58)
arraycopy(bs, 0, bullets, bullets.length - bs.length, bs.length); // 追加数组 } } /** 子弹与飞行物碰撞检测 */ public void bangAction() { for (int i = 0; i < bullets.length; i++) { // 遍历所有子弹 Bullet b = bullets[i]; bang(b); // 子弹和飞行物之间的碰撞检查 } } ...
publicbooleanadd(Te) {finalReentrantLocklock=this.lock;lock.lock();try {Object[] elements=getArray();intlen=elements.length;// 复制出新数组Object[] newElements=Arrays.copyOf(elements, len+1);// 把新元素添加到新数组里newElements[len] =e;// 把原数组引用指向新数组setArray(newElements);return...
Unsafe类中有很多以BASE_OFFSET结尾的常量,比如ARRAY_INT_BASE_OFFSET,ARRAY_BYTE_BASE_OFFSET等,这些常量值是通过arrayBaseOffset方法得到的。arrayBaseOffset方法是一个本地方法,可以获取数组第一个元素的偏移地址。Unsafe类中还有很多以INDEX_SCALE结尾的常量,比如 ARRAY_INT_INDEX_SCALE , ARRAY_BYTE_INDEX_SCALE等...
public native int arrayBaseOffset(Class arrayClass); /*** * Returns the scale factor used for addressing elements of the supplied * array class. Where a suitable scale factor can not be returned (e.g. * for primitive types), zero should be returned. The returned value ...