3.7construct.java

JAVA程序设计的源代码

public class Construct{
int i;
float f;
double d;
Construct(){    //无参的构造函数
i=3;
f=4;
d=5;
}
public static void main(String args[]){
Construct newInstance=new Construct();    //创建一个不带参数的对象
System.out.println("实例newinstance的各个成员的初值为:");
System.out.println("i = "+newInstance.i);
System.out.println("f = "+newInstance.f);
System.out.println("d = "+newInstance.d);
}
}