本帖最后由 我为你着迷 于 2014-12-7 17:34 编辑
- import java.io.*;
- import java.util.*;
- class Student implements Comparable<Student>
- {
- private String name;
- private int ma,cn,en;
- private int sum;
-
- Student(String name,int ma,int cn,int en)
- {
- this.name=name;
- this.ma=ma;
- this.cn=cn;
- this.en=en;
- sum=ma+cn+en;
- }
- public int compareTo(Student s)
- {
- int num=new Integer(this.sum).compareTo(new Integer(s.sum));
- if(num==0)
- return this.name.compareTo(s.name);
- return num;
- }
-
- public String getName()
- {
- return name;
- }
- public int getSum()
- {
- return sum;
- }
- public int haskCode()
- {
- return name.hashCode()+sum*78;
- }
- public boolean equals(Object obj)
- {
- if(!(obj instanceof Student))
- throw new ClassCastException("类型不匹配");
- Student s=(Student)obj;
-
- return this.name.equals(s.name)&&this.sum==s.sum;
- }
-
- public String toString()
- {
- return "student["+name+","+ma+","+cn+","+en+"]";
- }
- }
- class StudentInfoTool
- {
- public static Set<Student> getStudents() throws IOException
- {
- BufferedReader bufr=new BufferedReader(new InputStreamReader(System.in));
-
- String line=null;
- Set<Student> stus=new TreeSet<Student>();
- while((line=bufr.readLine())!=null)
- {
- if("over".equals(line))
- break;
-
- String[] info=line.split(",");
-
- Student stu=new Student(info[0],Integer.parseInt(info[1]),Integer.parseInt(info[2]),Integer.parseInt(info[3]));
-
- stus.add(stu);
-
- }
- bufr.close();
- return stus;
-
- }
- public static void write2File(Set<Student> stus) throws IOException
- {
- BufferedWriter bufw=new BufferedWriter(new FileWriter("stuinfo.txt"));
-
- for(Student stu:stus)
- {
- bufw.write(stu.toString()+"\t");
- bufw.write(stu.getSum()+"");
- bufw.newLine();
- bufw.flush();
- }
- bufw.close();
- }
- }
- class StudentInfoTest
- {
- public static void main(String[] args) throws IOException
- {
- Set<Student>stus=StudentInfoTool.getStudents();
-
- StudentInfoTool.write2File(stus);
- }
- }
复制代码
大家好 我这个为什么最后打印出是这样的呀 看着这么别扭 程序和视频是一样的。数字不是对齐的 你们是对齐的吗?
student[wangwu,10,20,10] 40
student[zhouliu,29,30,90] 149
student[zhangsan,40,20,90] 150
student[zhouqi,50,50,50] 150
student[lisi,90,90,90] 270
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