用 k-means方法對(duì)下面的數(shù)據(jù)進(jìn)行分類，k=3，要求用java寫代碼 怎么做

第一次迭代下,除了a4點(diǎn),其他點(diǎn)都?xì)w為一類c1:(a1 a2 a3 a5);c2:(a4) 聚類中心：c1:(2,2);c2(5,4)（聚類中心的計(jì)算方式是平均類中所有點(diǎn)）

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第二次迭代下,c1(a1 a2 a5);c2(a3 a4) 聚類中心c1:(4/3,5/3);c2(9/2 7/2)

第三次迭代下,c1(a1 a2 a5);c2(a3 a4) 聚類中心c1:(4/3,5/3);c2(9/2 7/2)結(jié)果已經(jīng)穩(wěn)定跳出循環(huán)

Java編程，填寫下面的代碼

class NoLowerLetterException extends Exception {

public NoLowerLetterException(String msg) {

super(msg);

}

}

class NoDigitException extends Exception {

public NoDigitException(String msg) {

super(msg);

}

}

class People {

void printLetter(char c) {

if (c = 'a' c = 'z') {

System.out.println(c);

} else {

try {

throw new NoLowerLetterException(String.valueOf(c));

} catch (NoLowerLetterException e) {

e.printStackTrace();

}

}

}

void printDigit(char c) {

if (c = '0' c = '9') {

System.out.println(c);

} else {

try {

throw new NoDigitException(String.valueOf(c));

} catch (NoDigitException e) {

e.printStackTrace();

}

}

}

}

public class ExceptionExample {

public static void main(String args[]) {

People people = new People();

for (int i = 0; i 128; i++) {

// 【代碼5】

// //將i轉(zhuǎn)換為char類型，執(zhí)行people.printLetter()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯(cuò)誤信息！

people.printLetter((char) i);

}

for (int i = 0; i 128; i++) {

// 【代碼6】 //將i轉(zhuǎn)換為char類型，執(zhí)行people. printDigit

// ()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯(cuò)誤信息！

people.printDigit((char) i);

}

}

}

高分求兩個(gè)簡(jiǎn)單的JAVA設(shè)計(jì)源代碼

上面 wuzhikun12同學(xué)寫的不錯(cuò)，但我想還不能運(yùn)行，并且還不太完善。我給個(gè)能運(yùn)行的：（注意：文件名為：Test.java)

//要實(shí)現(xiàn)對(duì)象間的比較，就必須實(shí)現(xiàn)Comparable接口，它里面有個(gè)compareTo方法

//Comparable最好使用泛型，這樣，無(wú)論是速度還是代碼量都會(huì)減少

@SuppressWarnings("unchecked")

class Student implements ComparableStudent{

private String studentNo; //學(xué)號(hào)

private String studentName; //姓名

private double englishScore; //英語(yǔ)成績(jī)

private double computerScore; //計(jì)算機(jī)成績(jī)

private double mathScore; //數(shù)學(xué)成績(jī)

private double totalScore; //總成績(jī)

//空構(gòu)造函數(shù)

public Student() {}

//構(gòu)造函數(shù)

public Student(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore) {

this.studentNo = studentNo;

this.studentName = studentName;

this.englishScore = englishSocre;

this.computerScore = computerScore;

this.mathScore = mathScore;

}

//計(jì)算總成績(jī)

public double sum() {

this.totalScore = englishScore+computerScore+mathScore;

return totalScore;

}

//計(jì)算評(píng)測(cè)成績(jī)

public double testScore() {

return sum()/3;

}

//實(shí)現(xiàn)compareTO方法

@Override

public int compareTo(Student student) {

double studentTotal = student.getTotalScore();

return totalScore==studentTotal?0:(totalScorestudentTotal?1:-1);

}

//重寫toString方法

public String toString(){

return "學(xué)號(hào)："+this.getStudentNo()+" 姓名："+this.getStudentName()+" 英語(yǔ)成績(jī)："+this.getEnglishScore()+" 數(shù)學(xué)成績(jī)："+this.getMathScore()+" 計(jì)算機(jī)成績(jī)："+this.getComputerScore()+" 總成績(jī)："+this.getTotalScore();

}

//重寫equals方法

public boolean equals(Object obj) {

if(obj == null){

return false;

}

if(!(obj instanceof Student)){

return false;

}

Student student = (Student)obj;

if(this.studentNo.equals(student.getStudentName())) { //照現(xiàn)實(shí)來(lái)說(shuō)，比較是不是同一個(gè)學(xué)生，應(yīng)該只是看他的學(xué)號(hào)是不是相同

return true;

} else {

return false;

}

}

/*以下為get和set方法，我個(gè)人認(rèn)為，totalScore的set的方法沒(méi)必要要，因?yàn)樗怯善渌煽?jī)計(jì)算出來(lái)的

在set方法中，沒(méi)設(shè)置一次值，調(diào)用一次sum方法，即重新計(jì)算總成績(jī)

*/

public String getStudentNo() {

return studentNo;

}

public void setStudentNo(String studentNo) {

this.studentNo = studentNo;

sum();

}

public String getStudentName() {

return studentName;

}

public void setStudentName(String studentName) {

this.studentName = studentName;

sum();

}

public double getEnglishScore() {

return englishScore;

}

public void setEnglishScore(double englishScore) {

this.englishScore = englishScore;

sum();

}

public double getComputerScore() {

return computerScore;

}

public void setComputerScore(double computerScore) {

this.computerScore = computerScore;

sum();

}

public double getMathScore() {

return mathScore;

}

public void setMathScore(double mathScore) {

this.mathScore = mathScore;

sum();

}

public double getTotalScore() {

return totalScore;

}

}

//Student子類學(xué)習(xí)委員類的實(shí)現(xiàn)

class StudentXW extends Student {

//重寫父類Student的testScore()方法

@Override

public double testScore() {

return sum()/3+3;

}

public StudentXW() {}

//StudentXW的構(gòu)造函數(shù)

public StudentXW(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore) {

super(studentNo,studentName,englishSocre,computerScore,mathScore);

}

}

//Student子類班長(zhǎng)類的實(shí)現(xiàn)

class StudentBZ extends Student {

//重寫父類Student的testScore()方法

@Override

public double testScore() {

return sum()/3+5;

}

public StudentBZ() {}

//StudentXW的構(gòu)造函數(shù)

public StudentBZ(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore) {

super(studentNo,studentName,englishSocre,computerScore,mathScore);

}

}

//測(cè)試類

public class Test {

public static void main(String[] args) {

//生成若干個(gè)student類、StudentXW類、StudentBZ類

Student student1 = new Student("s001","張三",70.5,50,88.5);

Student student2 = new Student("s002","李四",88,65,88.5);

Student student3 = new Student("s003","王五",67,77,90);

StudentXW student4 = new StudentXW("s004","李六",99,88,99.5);

StudentBZ student5 = new StudentBZ("s005","朱漆",56,65.6,43.5);

Student[] students = {student1,student2,student3,student4,student5};

for(int i = 0 ; istudents.length; i++){

double avgScore = students[i].testScore();

System.out.println(students[i].getStudentName()+"學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?+ avgScore+"分");

}

}

}

運(yùn)行結(jié)果為：

張三學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?9.66666666666667分

李四學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?0.5分

王五學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?8.0分

李六學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?8.5分

朱漆學(xué)生的評(píng)測(cè)成績(jī)?yōu)椋?0.03333333333333分

分享題目：譜聚類的java代碼,java 聚類
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