class zf extends lines {
void zf (int line) {
this.width = this.height = line;
}
public static void main (String[] args) {
zf myZf = new zf();
myZf.zf(5);
System.out.println(myZf.area());
}
}
void zf (int line) {
this.width = this.height = line;
}
public static void main (String[] args) {
zf myZf = new zf();
myZf.zf(5);
System.out.println(myZf.area());
}
}
{
this.width=this.height=line;
}我说兄弟,什么语言的构造函数可以返回值的???zf(int line)
{
this.width=this.height=line;
}
改为:class Lines
java的类名要大写;