class CCirle
{
private static double pi=3.14;
private double radius;

public CCircle(double r){
radius=r;
}
public void compare(CCircle cir){
if(this==cir)
System.out.println("objects are equal");
else
System.out.println("objects are not equal");
}
}
public class app7_4
{
public static void main(String args[])
{
CCircle cir1=new CCircle(1.0);
CCircle cir2=new CCircle(2.0);
cir1.compare(cir2);
}
}


编译错误：F:\java\app7_4.java:6: 方法声明无效；需要返回类型
public CCircle(double r){
^
1 错误

Process completed.

编译错误提示:这么明显:你的构造方法名写的不对了 多了个c

class CCirle
{
private static double pi=3.14;
private double radius;

public CCircle(double r){
radius=r;
}
public void compare(CCircle cir){
if(this==cir)
System.out.println("objects are equal");
else
System.out.println("objects are not equal");
}
}
public class app7_4
{
public static void main(String args[])
{
CCircle cir1=new CCircle(1.0);
CCircle cir2=new CCircle(2.0);
cir1.compare(cir2);
}
}

构造函数名字写的有误

[此贴子已经被作者于2007-4-19 11:05:08编辑过]

写的是对的，只是少了一个无参的构造函数/

拼写明显不一样嘛
斑竹失误了。。。

。。。看错~~~~~~。

这就是不用IDE的坏处。

以后自己小心点,不要再问这种低级问题了,OK?
以下是正确代码

class CCircle
{
private static double pi=3.14;
private double radius;

public CCircle(double r)
{
radius=r;
}

public void compare(CCircle cir)
{
if(this==cir)
System.out.println("objects are equal");
else
System.out.println("objects are not equal");
}
}

public class app7_4
{
public static void main(String args[])
{
CCircle cir1=new CCircle(1.0);
CCircle cir2=new CCircle(2.0);
cir1.compare(cir2);
}
}