A. length() B. arrayLength() C. size() D. lengthOfArray() 相关知识点: 试题来源: 解析 A。在 Java 中,获取数组长度的方法是数组名.length。length()在 Java 中可以用来获取数组长度。arrayLength()、size()、lengthOfArray()在 Java 中都不是获取数组长度的正确方法。反馈...
publicclass Array { publicstaticvoid main(String[] args) { int[] arr1 = newint[]{1,2,3}; int[] arr2 = newint[3]; System.arraycopy(arr1, 0, arr2, 0, arr1.length); for(int i=0; i<arr2.length; i++){ System.out.println("arr2["+i+"]="+arr2[i]); } arr2[1]=1...
1publicstaticvoidmain(String[] args) {23int[] temp = {1,2,5,6,3};4/**5* 遍历数组, 打印每一个元素6*/7//方式18for(inti = 0; i < temp.length; i++) {9System.out.println(temp[i]);10}1112//方式213for(intitem : temp) {14System.out.println(item);15}1617//方式3, jdk8及...
for (int i = 0; i < airplaneRef.length; i++) { // for i, if i is less than the length of the array airplaneRef, increment i. if (airplaneRef[i].equalsIgnoreCase(passengerName)) { // iterates through all elements in the array, ignoring case sensitivity and looks for the passenge...
if(array[i] == null) { return i; } } } else if(array.getClass().getComponentType().isInstance(objectToFind)) { for(i = startIndex; i < array.length; ++i) { if(objectToFind.equals(array[i])) { return i; } } } return -1; ...
[]driversList=drivers.split(":");println("number of Drivers:"+driversList.length);for(String aDriver:driversList){try{println("DriverManager.Initialize: loading "+aDriver);Class.forName(aDriver,true,ClassLoader.getSystemClassLoader());}catch(Exception ex){println("DriverManager.Initialize: load ...
publicclassArrayIndexFinder{publicstaticintfindIndex(int[]array,inttarget){for(inti=0;i<array.length;i++){if(array[i]==target){returni;}}return-1;}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 可以在其他类中使用ArrayIndexFinder.findIndex(array, target)方法来获取目标元素的索引。
[]actualTypeArguments=parameterizedType.getActualTypeArguments();Assert.isTrue(actualTypeArguments.length==1,"Number of type arguments must be 1");// 设置结果this.type=actualTypeArguments[0];}// 这个方法开放出去用来调用 来获取泛型的具体Class类型publicTypegetType(){returnthis.type;}privatestaticClass...
int[]array = new int[]{10, 20, 30, 40, 50};for(int i = 0; i < array.length; i++){System.out.println(array[i]);} 也可以使用 for-each 遍历数组 int[] array = {1, 2, 3};for (int x : array) {System.out.println(x);} ...
> cons[] = clazz.getDeclaredConstructors();// 查看每个构造方法需要的参数for (int i = 0; i < cons.length; i++) {//获取构造函数参数类型Class<?> clazzs[] = cons[i].getParameterTypes();System.out.println("构造函数["+i+"]:"+cons[i].toString() );System.out.print("参数类型["+...