Java中静态变量的适用场景.docxVIP

Java中静态变量的适用场景　　Java类中的静态变量在程序运行期间，其内存空间对所有该类的对象实例而言是共享的，有些时候可以认为是全局变量。因此在某些时候为了节省系统内存开销、共享资源，可以将类中的一些变量声明为静态变量，通过下面的例子，你可以发现合理应用静态变量带来的好处：　　Java代码　　public class WeekA{　　static class Data {　　privateint week;　　private String name;　　Data(inti, String s) {　　week= i;　　name = s;　　}　　}　　Data weeks[] = {　　new Data(1, Monday), new Data(2, Tuesay), new Data(3, Wednesday), new Data(4, Thursday), new Data(5, Friday), new Data(6, Saturday), new Data(7, Sunday)　　};　　public static void main(String args[]) {　　finalint N = 10000;　　WeekAweekinstance;　　for (inti = 1; i = N; i++){　　weekinstance = new WeekA ();　　}　　}　　}　　public class WeekA{　　static class Data {　　privateint week;　　private String name;　　Data(inti, String s) {　　week= i;　　name = s;　　}　　}　　Data weeks[] = {　　new Data(1, Monday), new Data(2, Tuesay), new Data(3, Wednesday), new Data(4, Thursday), new Data(5, Friday), new Data(6, Saturday), new Data(7, Sunday)　　};　　public static void main(String args[]) {　　finalint N = 10000;　　WeekAweekinstance;　　for (inti = 1; i = N; i++){　　weekinstance = new WeekA ();　　}　　}　　}