蓝桥杯java历年真题及答案整理(闭关一个月,呕心沥血整理出来的) 1 算法是这样的,如果给定N个不同字符,将这N个字符全排列,最终的结果将会是N!种.如:给定 A.B.C三个不同的字符,则结果为:ABC.ACB.BAC.BCA.CAB.CBA一共3!=3*2=6种情况. package Question1_9; import java.util.Scanner; import java.util.Vector; public class Question1 { public static lo
笔试题 Java 易错题精选 1.写出下列程序的运行结果( )String 不变性Java 值传递 public class Test { public static void main(String[] args) { String a = "hello"; change(a); System.out.println(a); } public static void change(String name) { name = "world"; } } 运行结果 he
1.(单选题)What will be printed when you execute the following code? class C { C() { System.out.print("C"); } } class A { C c = new C(); A() { this("A"); System.out.print("A"); } A(String s) { System.out.print(s); } } class Test
20170105问题解析请点击今日问题下方的"[Java每日一题]20170106"查看(问题解析在公众号首发,公众号ID:weknow619) package Jan2017; public class Ques0106 { public void method01(String... strings, int num){ } public void method02(String... strings, int... is){ } } 今日问题: 以上两个方法使用了变长参数,请问这
package Dec2016; import java.util.Arrays; public class Ques1219 { public static void main(String[] args) { int num = 2; Dog[] dogs01 = new Dog[num]; // dogs01中有两只狗 for(int i = 0; i < num; i++){ dogs01[i] = new Dog(i, Color.values()[i]); } Dog[] dogs0
package Dec2016; public class Ques1209 { public static void main(String[] args){ People g = new People("张三"); // 定义监护人 People p1 = new People("儿子1", g); People p2 = p1.clone(); // 儿子2的信息通过拷贝儿子1来的 p2.setName("儿子2"); p1.getGuar
20161129问题解析请点击今日问题下方的"[Java每日一题]20161130"查看 package Nov2016; public class Ques1130 { public static void main(String[] args) { int i = 1; Ques1130.test(i); Ques1130.test(Integer.valueOf(i)); } public static void test(long n){ System.out.println(
package Nov2016.use01; class Test { public String getString(){ return "123"; } } package Nov2016; import Nov2016.use01.Test; public class Ques1121 { public static void main(String[] args) { Test test = new Test(); System.out.println(test.getStri
package Nov2016; import java.io.Serializable; public class Ques1115 implements Serializable{ private static final long serialVersionUID = 1L; public final int num = init(); // 通过方法赋值 public int init(){ return 123; } } 今日问题: 和20161114问题类似,还是将它序列化到磁盘,再
package Nov2016; import java.io.Serializable; public class Ques1111 implements Serializable{ private static final long serialVersionUID = 1L; public final int num = 123; } 今日问题: 请问如果将Ques1111序列化后存储到磁盘中,反序列化时将num属性修改为321,那么反序列化后对象的num值是多少?(此题为后面的题做铺垫)
