Java创建一个复数类

package table;

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public class Complex

{

double real;

double imaginary;

public static final Complex ZERO = new Complex (0, 0);

public static final Complex ONE = new Complex (1, 0);

public static final Complex I = new Complex (0, 1);

public Complex ( double real, double imaginary )

{

this.real = real;

this.imaginary = imaginary;

}

public double magnitude ()

{

return Math.sqrt (this.real * this.real + this.imaginary * this.imaginary);

}

public Complex negative ()

{

return new Complex (-real, -imaginary);

}

public double valueOf ()

{

return this.real;

}

public Complex add ( Complex a, Complex b )

{

return new Complex (a.real + b.real, a.imaginary + b.imaginary);

}

public Complex subtract ( Complex a, Complex b )

{

return new Complex (a.real - b.real, a.imaginary - b.imaginary);

}

public Complex multiply ( Complex a, Complex b )

{

return new Complex (a.real * b.real - a.imaginary * b.imaginary, a.real * b.imaginary + a.imaginary * b.real);

}

@Override

public String toString ()

{

StringBuilder builder = new StringBuilder ();

builder.append ("Complex [real=").append (real).append (", imaginary=").append (imaginary).append ("]");

return builder.toString ();

}

}

用java编写一个复数类，包含实部和虚部属性，还有复数相加、相减以及复数的求模、输出复数字符串”a+bi”

import java.util.*;

public class ComplexTest{

static class ComplexNumber{

private double real,image;

public ComplexNumber(){

this(0.0,0.0);}

public ComplexNumber(double a,double b){

real=a;image=b;

}

public ComplexNumber add(ComplexNumber x){

return new ComplexNumber(real+x.real,image+x.image);}

public ComplexNumber sub(ComplexNumber x){

return new ComplexNumber(real-x.real,image-x.image); }

public ComplexNumber mul(ComplexNumber x){

return new ComplexNumber(real*x.real-image*x.image,real*x.image+image*x.real);}

public ComplexNumber div(ComplexNumber x){

if(x.real==0x.image==0){

System.out.println("无法进行除法！");

return new ComplexNumber();}

else return new ComplexNumber((real*x.real+image*x.image)/(x.real*x.real+x.image*x.image)

,(image*x.real-real*x.image)/(x.real*x.real+x.image*x.image));}

public double getReal (){return real;}

public double getImage (){return image;}

public void show(){System.out.println(this.toString());}

public String toString(){

if(image0)return ""+real+image+"i";

else return ""+real+"+"+image+"i";

}

}

static class Test{

public Test(){

Scanner sr=new Scanner(System.in);

ComplexNumber a,b,c;

try{System.out.println("请输入第一个实部和虚部：");

a=new ComplexNumber(sr.nextDouble(),sr.nextDouble());

System.out.println("请输入第二个实部和虚部：");

b=new ComplexNumber(sr.nextDouble(),sr.nextDouble());

System.out.print("第一个复数：");a.show();

System.out.print("第二个复数：");b.show();

c=a.add(b);

System.out.print("两个复数的和：");c.show();

c=a.sub(b);

System.out.print("两个复数的差：");c.show();

c=a.mul(b);

System.out.print("两个复数的积：");c.show();

c=a.div(b);

System.out.print("两个复数的商：");c.show();

}

catch(InputMismatchException e){

System.out.println("输入有误！");}

}

}

public static void main(String[] args){

new Test();

}

}

java 中实现复数的加减

（1）：具体代码(附注释)

复数类：

public class Complex {

private float shibu;

private float xubu;

Complex()

{this(0,0);

}

Complex(float shibu,float xubu){

this.shibu=shibu;

this.xubu=xubu;

}

public void Add(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu+p.shibu;

result.xubu=this.xubu+p.xubu;

System.out.print("加法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public void Sub(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu-p.shibu;

result.xubu=this.xubu-p.xubu;

System.out.print("加法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public void Mul(Complex p)

{

Complex result=new Complex();

result.shibu=this.shibu*p.shibu-this.xubu*p.xubu;

result.xubu=this.shibu*p.xubu+p.shibu*this.xubu;

System.out.print("乘法结果为:"+result.shibu+"+"+result.xubu+"i");

}

public static void main(String[] args) {

Complex fushu1=new Complex(1,2);

Complex fushu2=new Complex(3,4);

fushu1.Add(fushu2);

fushu1.Sub(fushu2);

fushu1.Mul(fushu2);

}

}

（2）：提供一个例子：

源代码：

import java.io.*;

public class Book{

double sb;

double xb;

Book(double x,double y){

this.sb=x;

this.xb=y;

}

Book(){

}

public static void main(String args[]){

System.out.println("请输入数据：");

double a=0;

double b=0;

double c=0;

double d=0;

String s;

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入第一个复述的实部：");

try{

s = in.readLine();

a=Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第一个复述的虚部：");

try{

s = in.readLine();

b =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第二个复述的实部：");

try{

s = in.readLine();

c =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

System.out.println("请输入第二个复述的虚部：");

try{

s = in.readLine();

d =Double.parseDouble(s);

}

catch(IOException e)

{ System.out.println("抛掷异常");}

Book h;

h=new Book(a,b);

Book j;

j=new Book(c,d);

System.out.println("您输入的一个数为：");

toString(h);

System.out.println("您输入的二个数为：");

toString(j);

Book k;

k=new Book();

char z='y';

do{

System.out.println("请选择您要进行的计算：");

System.out.println("1 ：进行加法运算");

System.out.println("2 ：进行减法运算");

System.out.println("3 ：进行修改");

System.out.println("4 ：进行乘法运算");

System.out.println("5 ：进行除法运算");

System.out.println("6 ：查看修改结果");

int i=0;

try{

i= Integer.parseInt(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

switch(i)

{

case 1:

k.sb=jia(h.sb,j.sb);

k.xb=jia(h.xb,j.xb);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 2:

k.sb=jian(h.sb,j.sb);

k.xb=jian(h.xb,j.xb);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 3:

System.out.println("请输入您要修改哪个实数：");

int l=0;

try{

l= Integer.parseInt(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

if(l==1)

{

h.xiugais(h);

h.xiugaix(h);

}

else

{

xiugais(j);

xiugaix(j);

}

break ;

case 4:

double f=0;

double e=0;

f=cheng(h.sb,j.sb)+cheng(h.xb,j.xb);

e=cheng(h.sb,j.xb)+cheng(h.xb,j.sb);

k.sb=(double)(Math.round(f*100)/100.0);

k.xb=(double)(Math.round(e*100)/100.0);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 5:

double chushu=cheng(j.sb,j.sb)-cheng(j.xb,-j.xb);

double beichushus=jian(cheng(h.sb,j.sb),cheng(h.xb,-j.xb));

double beichushux=jia(cheng(h.sb,-j.xb),cheng(h.xb,j.sb));

k.sb=chu(beichushus,chushu);

k.xb=chu(beichushux,chushu);

System.out.println("计算结果的实部为："+k.sb);

System.out.println("计算结果的虚部为："+k.xb);

toString(k);

break ;

case 6:

System.out.println("修改后的结果为：");

System.out.println("第一个复数："+toString(h));

System.out.println("第二个复数："+toString(j));

break ;

}

System.out.println("请问您是否还要继续 y/n：");

try{

z=(char)System.in.read();

System.in.skip(2); //忽略回车换行

}

catch(IOException e){}

} while(z=='y');

}

public static double gets(Book a){

return a.sb;

}

public static double getx(Book b){

return b.xb;

}

public static double xiugais(Book a)

{

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入您要修改的实部：");

double m=0;

try{

m= Double.parseDouble(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

a.sb=m;

System.out.println("修改成功：");

return 0;

}

public static double xiugaix(Book b)

{

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

System.out.println("请输入您要修改的虚部：");

double n=0;

try{

n= Double.parseDouble(in.readLine());

}

catch(IOException e)

{ System.out.println("抛掷异常");}

b.xb=n;

System.out.println("修改成功：");

return 0;

}

public static double jia(double a,double b)//

{

double c=0;

c=a+b;

System.out.println("加法成功：");

return c ;

}

public static double jian(double a,double b)

{

double c=0;

c=a-b;

System.out.println("减法成功：");

return c;

}

public static double cheng(double a,double b)

{

double c=0;

c=a*b;

System.out.println("乘法成功：");

return  c;

}

public static double chu(double a,double b)

{

double d=0;

double c=0;

d=a/b;

c=(double)(Math.round(d*100)/100.0);

System.out.println("除法成功：");

return c ;

}

public  static double toString(Book a){

System.out.println("结果为："+a.sb+"+"+a.xb+"*i");

return 0;

}

}

（3）测试结果截图：

java 编写一个可对复数进行加减运算的程序

1、real和image这两个field前面的static去掉。

2、public Complex() 这个构造器去掉，如果要接受输入的话，应该放到main方法里，这样这个类更清晰。

3、静态方法Complex_add和Complex_minus没指定返回值类型，应该返回的是Complex。另外方法名字首字母应小写。

4、参考这个：

用java 编写一个复数类

public class Complex {

protected int a;

protected int b;

public Complex(int a, int b) {

this.a = a;

this.b = b;

}

public String toString() {

return this.a + " + " + this.b + "i";

}

public static Complex addition(Complex complex1, Complex complex2) {

int a = complex1.a + complex2.a;

int b = complex1.b + complex2.b;

return new Complex(a, b);

}

public static Complex subtract(Complex complex1, Complex complex2) {

int a = complex1.a - complex2.a;

int b = complex1.b - complex2.b;

return new Complex(a, b);

}

public static Complex multiplication(Complex complex1, Complex complex2) {

int a = complex1.a * complex2.a - complex1.b * complex2.b;

int b = complex1.b * complex2.a + complex1.a * complex2.b;

return new Complex(a, b);

}

public static Complex division(Complex complex1, Complex complex2) throws Exception {

if (complex2.a == 0) {

throw new Exception("complex2.a is 0");

}

if (complex2.b == 0) {

throw new Exception("complex2.b is 0");

}

int a = (complex1.a * complex2.a + complex1.b * complex2.b) / (complex2.a * complex2.a + complex2.b * complex2.b);

int b = (complex1.b * complex2.a - complex1.a * complex2.b) / (complex2.a * complex2.a + complex2.b * complex2.b);

return new Complex(a, b);

}

}

//测试用的类

public class ComplexTest {

public static void main(String[] args) throws Exception{

// TODO Auto-generated method stub

Complex complex1 = new Complex(1, 2);

Complex complex2 = new Complex(3, 4);

System.out.println(complex1 + " + " + complex2 + " = " + Complex.addition(complex1, complex2));

System.out.println(complex1 + " - " + complex2 + " = " + Complex.subtract(complex1, complex2));

System.out.println(complex1 + " x " + complex2 + " = " + Complex.multiplication(complex1, complex2));

System.out.println(complex1 + " / " + complex2 + " = " + Complex.division(complex1, complex2));

}

}

文章题目：复数类java代码,类的复数形式
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