我用java编程,编译时提示“使用了未经检查或不安全的操作”?怎么会出现这种情况?
import java.io.*;
import java.util.Vector;
class MGraph
{
private Vector ves;
private int[][] edges;
private int vexnum,arcnum,i,j;
public MGraph(String[] Ves,int[][]Edges,int m,int n) //m,n分别代表顶点数和弧数
{ves=new Vector(java.util.Arrays.asList(Ves));
for(i=0;i<n;i++)
for(j=0;j<n;j++)
{edges[i][j]=Edges[i][j];}
vexnum=m;
arcnum=n;
}
public Vector getVes(){return ves;}
public int getVexnum(){return vexnum;}
public int getArcnum(){return arcnum;}
public void setEdges(int[][] Edges)
{for(i=0;i<vexnum;i++)
for(j=0;j<vexnum;j++)
{edges[i][j]=Edges[i][j];}
}
public void setVexnum(int aVexnum)
{vexnum=aVexnum;
}
public void setArcnum(int aArcnum)
{arcnum=aArcnum;
}
}
import java.io.*;
import java.util.Vector;
class MGraph
{
private Vector ves;
private int[][] edges;
private int vexnum,arcnum,i,j;
public MGraph(String[] Ves,int[][]Edges,int m,int n) //m,n分别代表顶点数和弧数
{ves=new Vector(java.util.Arrays.asList(Ves));
for(i=0;i<n;i++)
for(j=0;j<n;j++)
{edges[i][j]=Edges[i][j];}
vexnum=m;
arcnum=n;
}
public Vector getVes(){return ves;}
public int getVexnum(){return vexnum;}
public int getArcnum(){return arcnum;}
public void setEdges(int[][] Edges)
{for(i=0;i<vexnum;i++)
for(j=0;j<vexnum;j++)
{edges[i][j]=Edges[i][j];}
}
public void setVexnum(int aVexnum)
{vexnum=aVexnum;
}
public void setArcnum(int aArcnum)
{arcnum=aArcnum;
}
}
ves = new Vector<String>(java.util.Arrays.asList(Ves));
这是JDK 5.0开始的泛型。有些警告是无法屏蔽和解决的,只能采用
@SuppressWarnings("unchecked")
public void myMethod(){
...
}
还有个问题,private int[][] edges;
我定义成私有的,应怎样写get方法?
....
}
@SuppressWarnings("unchecked")
=================================
有些时候这个东西很恶心的说
....
}
里面应该怎么写?在外方法怎么调用?