1.Set 没有顺序不能重复
以下代码该怎么解释呢?谢谢..
[code="java"]import java.util.*;
import static java.lang.System.out;
class G086
{
String s;
G086(String v)
{
this.s = v;
}
public int hashCode()
{
return 1;
}
public boolean equals(G086 g)
{
if(s.charAt(0)==g.s.charAt(0))
return true;
return false;
}
/*
public String toString()
{
return this.s;
}
*/
public static void main(String[] args)
{
G086 g1 = new G086("aaa");
G086 g2 = new G086("aaa");
String t = "-";
if(g1.equals(g2))
t += "1";
//t += g1.equals(g2);
if(g1==g2)
t += " 2";
Set s1 = new HashSet();
s1.add(g1);
s1.add(g2);
out.println(t+" "+s1.size());
out.println(s1);
}
}[/code]