石化盈科笔试题.doc

1.程序执行结果是什么.public class Encapsulation class ClassValue public int i=15; public static void main(String args) / TODO Auto-generated method stubEncapsulation t=new Encapsulation();t.first();public void first()ClassValue cv=new ClassValue();second(cv);System.out.println(cv.i:+cv.i);public void second(ClassValue v)ClassValue cv=new ClassValue();v.i=25;v=cv;System.out.println(v.i:+v.i);2.程序输出结果是什么class A public void show() System.out.println(class a show );class B extends A public void show() System.out.println(class a show );public class Inherit /* * param args */public static void main(String args) A a = new B();if (a instanceof A) System.out.println(A );if (a instanceof B) System.out.println(B );3.程序输出结果是什么public class Polymorphic /* * param args */public static void main(String args) / TODO Auto-generated method stubParent pare = new Sub();pare.show();class Parent public void show() System.out.println(class Parent show );class Sub extends Parent public void show() System.out.println(class Sub show );4.程序输出结果是什么public class tryCatch /* * param args */public static void main(String args) try System.out.println(begin );System.out.println(end );return; catch (Exception e) System.out.println(excepton ); finally System.out.println(finally);5.对一个整型数组进行排序public class MySort public static void main(String args) MySort sort = new MySort();int arr = new int 3, 22, 11, 5, 400, 99, 20, 22, 5 ;sort.sort(arr);for (int i : arr) System.out.print(i + ,);public void sort(int targetArr) / 小到大的排序int temp = 0;for (int i = 0; i targetArr.length; i+) for (int j = i; j targetArr.length; j+) if (targetArri targetArrj) / 方法一：temp = targetArri;targetArri = targetArrj;targetArrj = temp;/* * /方法二: targetArri = targetArri + targetArrj; * targetArrj = targetArri - targetArrj; targetArri * = targetArri - targetArrj; */ 方法三：/ targetArri = targetArritargetArrj;/ targetArrj = targetArritargetArrj;/ targetArri = targetArritargetArrj;6.sql题目有两张表student,和scopeStudent:学号,姓名,性别,年