「java里面复数」java 复数类
本篇文章给大家谈谈java里面复数，以及java 复数类对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
- 1、Java创建一个复数类
- 2、java 中实现复数的加减
- 3、定义和实现复数的java类
- 4、用Java语言定义复数类Complex，必须满足如下要求：
- 5、java中怎么表示复数
- 6、java 复数问题
Java创建一个复数类
package table;
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 ();
}
}
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：
定义和实现复数的java类
public class Complex {
private double real, imag;// 定义实部和虚部
public Complex() {
}
public Complex(double r, double i) {
real = r;
imag = i;
}
public double getReal() {
return real;
}
public void setReal(double real) {
this.real = real;
}
public double getImag() {
return imag;
}
public void setImag(double imag) {
this.imag = imag;
}
public String toString() {
if (real == 0 imag == 0) {
return "0";
}
StringBuffer buf = new StringBuffer();
if (real != 0) {
buf.append(this.real);
if (imag 0) {
buf.append("+").append(imag).append("i");
} else if (imag 0) {
buf.append(imag).append("i");
}
} else {
buf.append(imag).append("i");
}
return buf.toString();
}
public Complex add(Complex a) {
return new Complex(real + a.real, imag + a.imag);
}
public static void main(String[] args) {
Complex c1 = new Complex(3.2, -4.7);
Complex c2 = new Complex(-3.9, 94.3);
Complex c3 = c1.add(c2);
System.out.println(c1);
System.out.println(c2);
System.out.println(c3);
}
}
用Java语言定义复数类Complex，必须满足如下要求：
public class Complex{
public int RealPart;
public int ImaginPart;
public Complex(){
this.RealPart = 0;
this.ImaginPart = 0;
}
public Complex(int r, int i){
this.RealPart = r;
this.ImaginPart = i
}
public Complex complexAdd(Complex a){
this.RealPart += a.RealPart;
this.ImaginPart += a.ImaginPart;
//这里返回什么？复数值是指哪个？还是复数对象？没有说清楚。我这里返回复数对象。
return this;
}
public String ToString(){
return ""+this.RealPart + this.ImaginPart;//return "" + 1 + 2 = "12";不知道这里要求是不是这样。有些话写的我没法理解。你的a + bi是个啥？如果是返回实数和虚数的和就给 1 + 2的部分加上括号。
}
}
java中怎么表示复数
public class Complex { /**成员属性定义实部和虚部 *@param real_part 实部 *@param imagin_part 虚部 */ private double real_part; private double imagin_part; //构造方法，初始化 public Complex() { this(0.0,0.0); } //构造方法的重载
java 复数问题
1、首先Java中的数都是有符号的
2、所以，负数的话只需直接在数字前面加个负号（-）即可，如-5。
3、要开平方的话，请直接调用Math.sqrt(数值)方法即可。
4、当然，由于要开平方的数都必须是正数，所以，你可以直接调用Math.abs(d)方法求绝对值最为正确与简便，而不用写成-(-5)，代码里也不提倡此写法。
有问题请继续提问，欢迎采纳，谢谢！
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发布于：2022-12-07，除非注明，否则均为原创文章，转载请注明出处。