可以使用普通的for循环来遍历数组,并通过判断元素与目标元素是否相等来获取索引。 int[]array={1,2,3,4,5};inttarget=3;intindex=-1;for(inti=0;i<array.length;i++){if(array[i]==target){index=i;break;}}if(index!=-1){System.out.println("目标元素在数组中的索引为:"+index);}else{System....
System.out.println(i + ":" + dataList.get(i));} 增强For循环(获取index需要定义额外的变量)：int i = 0;for (String elem : dataList) { System.out.println(i + ":" + elem);i++;} ⾃定义静态⽅法实现带index的循环：for (Indexer elem : ExtFor1.loop(dataList)) { System.out....
public void testArrayLooping(PrintStream out) throws IOException { int[] primes = new int[] { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 }; // Print the primes out using a for/in loop for (int n : primes) { out.println(n); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 1...
int i = 0; for (String elem : dataList) { System.out.println(i + ":" + elem); i++; } 自定义静态方法实现带index的循环: for (Indexer<String> elem : ExtFor1.loop(dataList)) { System.out.println(elem.index() + ":" + elem.value()); } public class ExtFor1 { public static...
(i)); } 增强For循环(获取index需要定义额外的变量): int i = 0; for (String elem : dataList) { System.out.println(i + : + elem); i++; } ⾃定义静态⽅法实现带index的循环: for (Indexer elem : ExtFor1.loop(dataList)) { System.out.println(elem.index() + : + elem.value()...
transient int size=0;transient Node<E>first;transient Node<E>last;publicEget(int index){checkElementIndex(index);returnnode(index).item;}Node<E>node(int index){if(index<(size>>1)){//查询位置在链表前半部分,从链表头开始查找Node<E>x=first;for(int i=0;i<index;i++)x=x.next;returnx...
Update Release Notes Index JDK DocumentationChanges in 1.6.0_10The full internal version number for this update release is 1.6.0_10-b33 (where "b" means "build"). The external version number is 6u10. Included in JDK 6u10 is version 11.0 of the Java HotSpot Virtual Machine....
That is why the subroutine FOR … NEXT loop, starting at line 520, loops through I –1 times. If both the main program's and the subroutine's FOR … NEXT loops used the same index variable (I), the program could not run properly. BASIC was so popular for early PC use that many ...
Update Release Notes Index JDK Documentation Changes in 1.6.0_04The full internal version number for this update release is 1.6.0_04-b12 (where "b" means "build"). The external version number is 6u4. Included in JDK 6u4 is version 10.0 of the Java HotSpot Virtual Machine....
同步器的主要使用方式是继承AbstractQueuedSynchronizer,通过同步器提供的3个方法getState()、setState(int newState)和compareAndSetState(int expect,int update)来进行线程安全的状态同步。 同步器是实现锁的关键,在锁的实现中聚合同步器,利用同步器实现锁的语义。 可以这样理解二者之间的关系: ...