用Java定义一个复数类complex,它的内部具有两个实例变量：realPart和imagPart,分别代表复数的实部

import java。util。Scanner;public class Complex {private int realPart;private int imagPart;public int getRealPart() {return realPart;}public void setRealPart(int realPart) {this。realPart = realPart;}public int getImagPart() {return imagPart;}public void setImagPart(int imagPart) {this。imagPart = imagPart;}public Complex plus(Complex c){int real=this。realPart+c。realPart;int imag=this。imagPart+c。imagPart;Complex result=new Complex();result。setRealPart(real);result。setImagPart(imag);return result;}public Complex minus(Complex c){int real=this。realPart-c。realPart;int imag=this。imagPart-c。imagPart;Complex result=new Complex();result。setRealPart(real);result。setImagPart(imag);return result;}public String format(){if(this。imagPart