2
1. #
using System;
//
delegate int DelRet (int x, int y);
delegate void DelRef (int x, int y, ref int z);
class TestDel
{
static void Main ()
{
TestDel tD= new TestDel(); // TestDel
// DelRet SumRet
DelRet tRet= new DelRet (tD.SumRet);
// tRet
Console.WriteLine ("4+5= " + tRet(4, 5));
//DelRet tRet1= new DelRet(tD.SumRef); //
// DelRef SumRef
DelRef tRef= new DelRef (tD.SumRef);
// tRet
int z=0;
tRef (10, 20, ref z);
Console.WriteLine ("10+20= " + z);
// UseDel DelRet DelRef
Console.WriteLine ("(11+12)+(100+200)= " + tD.UseDel(tRet, tRef));
}
int SumRet (int a, int b){return a+b;}
void SumRef (int a, int b, ref int c){c= a+b;}
int UseDel (DelRet dR, DelRef dF)
{
int tmp= 0;
dF (11,22, ref tmp);
return tmp+dR (100,200);
}
}
1. ( )
using System;
//
delegate void DelEv (int x, string s);
class TestEv
{
public event DelEv ev; //
static void Main ()
{
TestEv tE= new TestEv (); // TestEv
// ev
tE.ev +=new DelEv (tE.Handler);
//
tE.ev (4,"four");
}
//
void Handler (int a, string b)
{
Console.WriteLine ("a= " + a + " b= "+ b);
}
}
2. ( )
using System;
//
delegate void DelEv (int x, string s);
class Source //
{
public event DelEv ev; //
//
public void Fire (int x, string s)
{
if(ev!= null) ev (x, s);
}
}
class Receiver //
{
//
public void Handler (int a, string b)
{
Console.WriteLine ("a= " + a + " b= "+ b);
}
}
class TestEv
{
static void Main ()
{
Source s= new Source (); //
Receiver r= new Receiver (); //
// ev
s.ev +=new DelEv (r.Handler);
//
s.Fire (5,"five");
}
}
using System;
//
//delegate void DelEv (int x, string s);
//delegate void DelEv (object s, EventArgs args);
class OurEventArgs: EventArgs //
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|
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{
private int x;
private String s;
public OurEventArgs (int X, String S)
{x= X; s= S;}
public int X {get{return x;}}
public String S{get{return s;}}
}
class Source
{
public event EventHandler ev; //
//
public void Fire (int x, string s)
{
//
OurEventArgs oE= new OurEventArgs (x, s);
//
if(ev!= null) ev (this, oE);
}
}
class Receiver
{
//
public void Handler (object sender, EventArgs oE)
{
//
OurEventArgs oea= (OurEventArgs)oE;
Console.WriteLine ("a= " + oea.X + " b= "+ oea.S);
}
}
class TestEv
{
static void Main ()
{
Source s= new Source (); //
Receiver r= new Receiver (); //
// ev
s.ev +=new EventHandler (r.Handler);
//
s.Fire (5,"five");
}
}
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2. Java
