1.使用String類分割split將字串“Solutions to selected exercises can be found in the electronic document The Thinking in Java Annotated Solution Guide,available for a small fee from BruceEckel”單詞提取輸出，單詞以空格或','分隔

public static void main(String[] args) {
        String str="Solutions to selected exercises can be found in the electronic document The Thinking in Java Annotated Solution Guide,available for a small fee from BruceEckel
 
";
        String[] string=str.split(" |,");
        for (String string2 : string) {
            System.out.print(string2+",");
        }
    }

2.設計一個類Student，類的屬性有姓名，學號，出生日期，性別，所在系等。並生成學生類物件陣列儲存學生資料，然後按照學生的姓名將學生排序輸出，使用String類的compareTo方法。函式原型輸入兩個學生物件，返回一個整型數字表示大小，以學生姓名為排序依據。

package com.littlepage.test2;

import java.util.Date;

 
public class Student implements Comparable<Student>{
    private String name;
    private int stuNum;
    private Date birthDate;
    private String sex;
    private String department;
    public Student() {
        name="";
        stuNum=0;
        birthDate=new Date();
        sex="男";
        department
 
="";
    }
    public Student(String name, int stuNum, Date birthDate, String sex, String department) {
        super();
        this.name = name;
        this.stuNum = stuNum;
        this.birthDate = birthDate;
        this.sex = sex;
        this.department = department;
    }
    @Override
    public String toString() {
        return "Student [name=" + name + ", stuNum=" + stuNum + ", birthDate=" + birthDate + ", sex=" + sex
                + ", department=" + department + "]";
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getStuNum() {
        return stuNum;
    }
    public void setStuNum(int stuNum) {
        this.stuNum = stuNum;
    }
    public Date getBirthDate() {
        return birthDate;
    }
    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getDepartment() {
        return department;
    }
    public void setDepartment(String department) {
        this.department = department;
    }
    @Override
    public int compareTo(Student o) {
        return this.getName().compareTo(o.getName());
    }
}

3.設計一個程式，計算任意的一個日期與系統當前日期相差天數