packagestruct;
importjava.math.BigDecimal;
importjava.util.Objects;
/*** @author java小豪* @version 1.0.0* @description 复数类*/publicclassComplex {
/**实部*/privatedoublereal;
/**虚部*/privatedoubleimag;
/**get/set方法*/publicdoublegetReal() {
returnreal;
    }
publicdoublegetImag() {
returnimag;
    }
publicvoidsetReal(doublereal) {
this.real=real;
    }
publicvoidsetImag(doubleimag) {
this.imag=imag;
    }
publicComplex() {}
publicComplex(doublereal, doubleimag) {
this.real=real;
this.imag=imag;
    }
/**** 两个复数相加* @param other* @return 复数相加*/publicComplexadd(Complexother) {
returnadd(this, other);
    }
publicstaticComplexadd(Complexcomplex, Complexother) {
doubler=complex.getReal() +other.getReal();
doublei=complex.getImag() +other.getImag();
returnnewComplex(r, i);
    }
/*** 两个复数相减* @param other* @return 复数相减*/publicComplexsub(Complexother) {
returnsub(this, other);
    }
publicstaticComplexsub(Complexcomplex, Complexother) {
doubler=complex.getReal() -other.getReal();
doublei=complex.getImag() -other.getImag();
returnnewComplex(r, i);
    }
/*** 两复数相乘* @param other* @return 复数相乘*/publicComplexmul(Complexother) {
returnmul(this, other);
    }
publicstaticComplexmul(Complexcomplex, Complexother) {
doubler=complex.getReal() *other.getReal() -complex.getImag() *other.getImag();
doublei=complex.getImag() *other.getReal() +complex.getReal() *other.getImag();
returnnewComplex(r, i);
    }
publicComplexdiv(Complexother) {
returndiv(this, other);
    }
publicstaticComplexdiv(Complexcomplex, Complexother) {
//如果为0,表示除以0, 产生除0异常。if(other.getReal() ==0&&other.getImag() ==0){
thrownewArithmeticException("除 0 异常");
        }
doubler=complex.getReal() *other.getReal() -complex.getImag() *other.getImag();
doublei= (complex.getImag() *other.getReal() -complex.getReal() *other.getImag())
/ (complex.getReal() *complex.getReal() +complex.getImag() *complex.getImag());
returnnewComplex(r, i);
    }
/*** 比较两个复数是否相等* @param o* @return true 或 false*/@Overridepublicbooleanequals(Objecto) {
if (this==o) {
returntrue;
        }
if (o==null||getClass() !=o.getClass()) {
returnfalse;
        }
Complexcomplex= (Complex) o;
returnDouble.compare(complex.real, real) ==0&&Double.compare(complex.imag, imag) ==0;
    }
@OverridepublicinthashCode() {
returnObjects.hash(real, imag);
    }
@OverridepublicStringtoString() {
StringBuildersb=newStringBuilder();
//保留四位小数，并且去0.StringtempR=newBigDecimal(this.real).
setScale(4, BigDecimal.ROUND_HALF_UP).stripTrailingZeros().toString();
sb.append(tempR);
//如果虚部为正，需要添加一个+号。 为-时，不需要添加if(this.imag>0){
sb.append("+");
        }
//如果为0,返回实部if(this.imag==0){
returnsb.toString();
        }
//添加虚部， 复数后面的 i是固定的StringtempI=newBigDecimal(this.imag).
setScale(4, BigDecimal.ROUND_HALF_UP).stripTrailingZeros().toString();
sb.append(tempI);
sb.append("i");
returnsb.toString();
    }
}
/*** @author java小豪* @version 1.0.0* @description 复数运算测试类*/publicclassComplexTest {
publicstaticvoidmain(String[] args) {
//1. 第一个复数, 实部为3,虚部为8Complexc1=newComplex(3, 8);
//2. 第二个复数， 实部为3,虚部为-6Complexc2=newComplex(4, -9);
//3. 第三个复数，实部为2，虚部为-7.Complexc3=newComplex(5, -9);
//4. 第四个复数，看是否相同Complexc4=newComplex(23, 8);
System.out.println("c1打印输出:"+c1.toString());
System.out.println(c1.toString() +"+"+c2.toString() +"="+Complex.add(c1, c2));
System.out.println(c1.toString() +"-"+c2.toString() +"="+Complex.sub(c1, c2));
System.out.println(c1.toString() +"*"+c2.toString() +"="+Complex.mul(c1, c2));
System.out.println(c1.toString() +"/"+c2.toString() +"="+Complex.div(c1, c2));
System.out.println(c1.toString()+"与"+c4.toString()+"是否相同:"+c1.equals(c4));
    }
}