当前页面: 开发资料首页 → J2SE 专题 → 自定义对象排序的问题,谢了
自定义对象排序的问题,谢了
摘要: 自定义对象排序的问题,谢了
import java.util.Arrays;
class StudentArray
{
Student[] ss1=new Student[]{new Student(11,"张三"),new Student(12,"李四"),new Student(13,"王五")};
Arrays.sort(ss1);
for(int i=0;i
{
System.out.println(ss1[i]);
}
}
class Student implements Comparable
{
int num;
String name;
Student(int num,String name)
{
this.num=num;
this.name=name;
}
public String toSring()
{
return "num= "+num+" name="+name;
}
public int compareTo(Object o)
{
Student s=(Student)o;
return num>s.num ? 1 : (num==s.num ? 0 : -1);
}
}
这段代码编译不过去,哪里出了问题,谢谢了
必须有且仅有一个类必须是Public的,并且和源文件同名,这一点你做到了吗?
JAVA 程序要从pbulic static void main(String[] args){// you code} 入口,才能运行
明白了,犯了一个低级的失误
import java.util.Arrays;
class StudentArray
{
public static void main(String[] args)
{
Student[] ss1=new Student[]{new Student(11,"张三"),new Student(12,"李四"),new Student(13,"王五")};
Arrays.sort(ss1);
for(int i=0;i
{
System.out.println(ss1[i]);
}
}
}
class Student implements Comparable
{
int num;
String name;
Student(int num,String name)
{
this.num=num;
this.name=name;
}
public String toString()
{
return "num= "+num+" name="+name;
}
public int compareTo(Object o)
{
Student s=(Student)o;
return num>s.num ? 1 : (num==s.num ? 0 : -1);
}
}
改成这样,public String toSring() 也写错了。应该是 toString()
结贴给分