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java畫彩虹源代碼 java繪制源碼

怎么用VB畫彩虹

原理上面不都有了么。。。

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好吧,我解釋一下:

d=3000 '圓的半徑

For i = 0 To 100 ‘畫100個(gè)不同半徑的圓

Circle (3200, 3200), d, RGB(255, 0, 0), 0, 3.14 ‘從點(diǎn)3200,3200開始畫半徑為d(3000)的半圓

d = d - 1 ‘直徑變小一個(gè)點(diǎn)

Next i ‘沒畫到100個(gè)圓就繼續(xù)畫

我發(fā)個(gè)畫彩虹的代碼吧,執(zhí)行結(jié)果:

代碼:

Private?Sub?Command1_Click()

d?=?3000

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(255,?0,?0),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(255,?165,?0),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(255,?255,?0),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(0,?255,?0),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(0,?127,?255),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(0,?0,?255),?0,?3.14

d?=?d?-?1

Next?i

For?i?=?0?To?100

Circle?(3200,?3200),?d,?RGB(139,?0,?255),?0,?3.14

d?=?d?-?1

Next?i

End?Sub

Java 怎么樣畫調(diào)色板、或彩虹、或色譜

先定義要漸變的顏色,然后試試這個(gè)

Graphics2D g2 = (Graphics2D) g;

//繪制漸變

g2.setPaint(new GradientPaint(

0, 0, new Color(116, 149, 226),

getWidth(), getHeight(),

new Color(199, 212, 247)

));

g2.fillRect(0, 0, getWidth(), getHeight());

求一個(gè)簡單java程序代碼,謝謝

public class TestStar {

public static void main(String[] args) {

String star = "*";

for (int i = 0; i 5; i++) {

if (i == 0) {

System.out.print(" " + star);

System.out.println();

}

if (i == 1) {

for (int z = 0; z 4; z++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 2) {

System.out.print(" ");

for (int x = 0; x 3; x++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 3) {

for (int y = 0; y 2; y++) {

System.out.print(" " + star + " ");

}

}

}

}

}

是好使的 但是我沒找到畫五角星有什么規(guī)律(五角星好象不是正規(guī)圖形吧?)如果還有什么要求的話 補(bǔ)充問題(如果是用*填充所有的東西 不包括 “ ”的話 我可以重新再給你寫一個(gè))

高分求兩個(gè)簡單的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

private String studentName; //姓名

private double englishScore; //英語成績

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

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

private double totalScore; //總成績

//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

public double sum() {

this.totalScore = englishScore+computerScore+mathScore;

return totalScore;

}

//計(jì)算評測成績

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:"+this.getStudentNo()+" 姓名:"+this.getStudentName()+" 英語成績:"+this.getEnglishScore()+" 數(shù)學(xué)成績:"+this.getMathScore()+" 計(jì)算機(jī)成績:"+this.getComputerScore()+" 總成績:"+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)來說,比較是不是同一個(gè)學(xué)生,應(yīng)該只是看他的學(xué)號是不是相同

return true;

} else {

return false;

}

}

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

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

*/

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)生的評測成績?yōu)椋?+ avgScore+"分");

}

}

}

運(yùn)行結(jié)果為:

張三學(xué)生的評測成績?yōu)椋?9.66666666666667分

李四學(xué)生的評測成績?yōu)椋?0.5分

王五學(xué)生的評測成績?yōu)椋?8.0分

李六學(xué)生的評測成績?yōu)椋?8.5分

朱漆學(xué)生的評測成績?yōu)椋?0.03333333333333分

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