//第一个
package bzu.info.software;
public class Circle{
prinvate double radius;
Cricle(double r){
radius=r;
}
public void setRadius(double r){
radius=r;
}
public double getRadius(){
return radius;
}
public double getArea(){
double t;
t=Math.PI*radius*radius;
return t;
}
}
//第二个
package bzu.info; public class A{ public static void main (String args[]){ Complex c; c=new Complex(4.0,3.0); c.print(); } }
注意
javac -d . Complex.java
javac -d . A.java
java bzu.info.A
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