package arrays.myArray;
import java.util.Scanner;
public class SortObject {
 private static int intercePosition = 0; // 记录单个运算数据的长度
 private static int[] intercePositionIndex = null; // 记录“（”的下标
 private static int[] intercePositionEnd = null; // 记录“）”的下标
 public static void main(String[] args) {
  Scanner input = new Scanner(System.in);
  do {
   System.out.println("请输入你要计算的字符串(注意：只能输入数字和加，减，乘除符号;输入完毕后,请直接回车):");
   String numberString = input.next().trim();
   // 判断输入的运算字符串是否符合规定
   if (ispassString(numberString) == false) {
    System.out.println("您输入的计算字符串有误,请正确输入!");
   } else {
    // 计算结果返回
    System.out.println(interceResult(numberString));
   }
  ......

package collection;
import java.util.*;
public class NewArrayList {
 public static void main(String[] args) {
  List<Student> students = new ArrayList<Student>();
  for (int i = 0; i < 6; i++) {
   students.add(new Student("Happy"+i,"male"+i,20+i));
  }
  print(students);
  print2(students);
 }
 
 //循环遍历①for
 public static void print(List<Student> newList){
  System.out.println("总数据："+newList.size());
  Student student;
  for (int i = 0; i < newList.size(); i++) {
   student = (Student)newList.get(i);
   System.out.println(student.toString());
  }
 }
 //循环遍历①Iterator
 public static void print2(List<Student> newList){
  System.out.println("总数据："+newList.size());
  Iterator<Student> iterator = newList.iterator();
  ......

package collection;
import java.util.*;
public class NewSet {
 public static void main(String[] args) {
  Set<Student> students = new HashSet<Student>();
  for (int i = 0; i < 6; i++) {
   students.add(new Student("Happy"+i,"male"+i,20+i));
  }
  students.add(new Student("Happy0","male0",20));
  print(students);
  print2(students);
 }
 
 //循环遍历①for
 public static void print(Set<Student> newList){
  System.out.println("总数据："+newList.size());
  /*Student student;
  for (int i = 0; i < newList.size(); i++) {
   student = (Student)newList
   System.out.println(student.toString());
  }*/
 }
 //循环遍历①Iterator
 public static void print2(Set<Student> newList){
  System.out.println("总数据："+newList.size());
  Iterator<Stu ......

package collection;
public class Student {
 
 public Student() {}
  
 public Student(String name, String sex, int age) {
  this.name = name;
  this.sex = sex;
  this.age = age;
 }
 @Override
 public String toString() {
  return "Student [toString()=" + this.name+"-->"+ this.sex +"-->"+ this.age + "]";
 }
 private String name;
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getSex() {
  return sex;
 }
 public void setSex(String sex) {
  this.sex = sex;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 private String sex;
 private int age;
} ......

package floatt;
public class Go {
 public static int i = 0;
 public static void main(String[] args){
  calc("", 5);
  System.out.println("总共有"+i+"种走法~");
 }
 
 //上楼梯每次只需一步或者两步，有多少走法
 public static void calc(String log, int num){
  if (num == 0) {
   i++;
   System.out.println(log.substring(0,log.length()-1));
   return;
  }else if(num == 1) {
   i++;
   System.out.println(log+"1");
   return;
  }
  calc(log+"1,", num - 1);
  calc(log+"2,", num - 2);
 }
} ......

package game;
public class HanTa {
 public static int i = 0;
 public static void main(String[] args){
  calc('A', 'B', 'C', 2);
  System.out.println("最少需要"+i+"步。");
 }
 
 //汉罗塔游戏计算
 public static void calc(char src, char ilde, char dest, int num){
  if(num == 1){
   i++;
   System.out.println(src+"-->"+dest);
   return;
  }
  calc(src, dest, ilde, num - 1);
  i++;
  System.out.println(src+"-->"+dest);
  calc(ilde, src, dest, num - 1);
 }
} ......