新装修房子墙体开裂:帮我看一下java程序的出错在哪里

这到题计算加减乘除的算法，我编译了一下好象是运算符号的错误
大家帮我看一下 乱码就是文字
public class Calcutor {
double a;//±äÁ¿ 1
double b;//±äÁ¿ 2

Calcutor(double a1,double b1){
a=a1;
b=b1;
}
void calcjieguo1(){
jieguo1=a+b;
}
void calcjieguo2(){
jieguo2=a-b;
}
void calcjieguo3(){
jieguo3=a*b;
}
void calcjieguo4(){
jieguo4=a/b;
}
void point(){
System.out.println("Ö´ÐмÓ"+jieguo1);
System.out.println("Ö´Ðмõ"+jieguo2);
System.out.println("Ö´ÐгË"+jieguo3);
System.out.println("Ö´Ðгý"+jieguo4);

}
public static void main(String [] args){
Calcutor objCalcutor1=new Calcutor(2,3);
objCalcutor1.calcjieguo1();
objCalcutor1.point();

Calcutor objCalcutor2=new Calcutor(4,5);
objCalcutor2.calcjieguo2();
objCalcutor2.point();

Calcutor objCalcutor3=new Calcutor(8,10);
objCalcutor3.calcjieguo3();
objCalcutor3.point();

Calcutor objCalcutor4=new Calcutor(15,3);
objCalcutor4.calcjieguo4();
objCalcutor4.point();

}
}