网络爬虫开发

package 公司支出的总薪水;abstract class Employee{ public abstract double earings();}class YearWorker extends Employee{ public double earings(){ return 12000; }}class MonthWorker extends Employee{...

import java.util.Scanner;public class zheban { public static void main(String[] args) { //选择排序数组 int start = 0,end,middle; int a[] = {12,45,67,89,123,-45,67}; int N = a.length; for(int i...

public class Example_4 { public static void main(String[] args) { //异或a1^A char a1 = '十', a2 = '点', a3 = '进', a4 = '攻'; char secret = 'A'; a1 = (char)(a1^secret); a2 = (char)(a2^secret);...

import java.util.Scanner;public class Example_32 { public static void main(String[] args) { // 条件分支 int a = 9,b = 5,c = 7,t = 0; if(b<a){ t = a; a = b; b = t; } if(c<a){ ...

public class Example_3 { public static void main(String[] args) { //数组的使用 float a[] = new float[5];//定义数组并没创建数组 System.out.println(a.length);//输出数组的长度 int b[] = {1,2,3,40};//定义数组并初始化 b =...

import java.util.Scanner;public class Example_2 { public static void main(String[] args) { //输入输出数据 System.out.println("请输入若干个数，每输入一个数回车确认"); System.out.println("最后输入数字0结束输入操作"); Scanner r...

public class Example_1 { public static void main(String[] args) { byte b = 22; int n = 129; float f =123456.6789f; double d = 123456789.123456789; System.out.println("b= "+b); System.o...