1
public class Demo {
2
public static void main(String args[]) {
3
int i = 0;
4 try {
5 if (i == 0) {
6 throw new LeafException();
7
}
8 } catch (TreeException e) {
9 e.printStackTrace();
10 }
11 }
12
}
13
14class TreeException extends Exception{
15 public TreeException () {
16 System.out.println("TreeException()");
17 }
18}
19
20class LeafException extends TreeException{
21 public LeafException () {
22 System.out.println("LeafException()");
23 }
24}
public class Demo {
2
public static void main(String args[]) {
3
int i = 0;4
try {5
if (i == 0) {6
throw new LeafException();7
}8
} catch (TreeException e) {9
e.printStackTrace();10
}11
}12
}13
14
class TreeException extends Exception{15
public TreeException () {16
System.out.println("TreeException()");17
}18
}19
20
class LeafException extends TreeException{21
public LeafException () {22
System.out.println("LeafException()");23
}24
}鎵撳嵃緇撴灉錛?br /> TreeException()
LeafException()
LeafException
at Demo.main(Demo.java:6)
xunSir.lee 2008-08-19 22:19 鍙戣〃璇勮
]]>錛氳皟鐢ㄧ埗綾繪柟娉?super.method())錛岀埗綾繪柟娉曚腑錛?br /> 璋冪敤鏂規硶錛屼紭鍏堟悳绱㈠瓙綾諱腑鏄惁鏈夎鏂規硶錛岀劧鍚庢槸鐖剁被鐨勶紱
璋冪敤灞炴э紝鍒欐槸浣跨敤鐖剁被鐨勫睘鎬с?br />
1
class Tree {
2
int i = 3, j = 5;
3
4
public Tree() {
5 this.show("Tree");
6
}
7
8 protected void show(String s) {
9 System.out.println(s);
10 }
11
12 public void t() {
13 this.show("Tree, t");
14 System.out.println(this.i);
15 System.out.println(this.j);
16 }
17
}
18
19class Leaf extends Tree {
20 int i = 10;
21
22 public Leaf () {
23 this.show("Leaf");
24 }
25
26 public void show(String s) {
27 System.out.println(s + "\t\tLeaf");
28 }
29
30 public void t() {
31 show("Leaf, t");
32 System.out.println(this.i);
33 System.out.println(this.j);
34 System.out.println();
35 super.t();
36 }
37
38 public static void main(String args[]) {
39 Leaf l = new Leaf();
40 l.t();
41
42 System.out.println("------------------");
43 System.out.println(l.i);
44 Tree t = new Leaf();
45 l = (Leaf) t;
46 System.out.println(t.i);
47 System.out.println(l.i);
48 }
49}
50
class Tree {
2
int i = 3, j = 5;3
4
public Tree() {
5
this.show("Tree");6
}7
8
protected void show(String s) {9
System.out.println(s);10
}11
12
public void t() {13
this.show("Tree, t");14
System.out.println(this.i);15
System.out.println(this.j);16
}17
}18
19
class Leaf extends Tree {20
int i = 10;21
22
public Leaf () {23
this.show("Leaf");24
}25
26
public void show(String s) {27
System.out.println(s + "\t\tLeaf");28
}29
30
public void t() {31
show("Leaf, t");32
System.out.println(this.i);33
System.out.println(this.j);34
System.out.println();35
super.t();36
}37
38
public static void main(String args[]) {39
Leaf l = new Leaf();40
l.t();41
42
System.out.println("------------------");43
System.out.println(l.i);44
Tree t = new Leaf();45
l = (Leaf) t;46
System.out.println(t.i);47
System.out.println(l.i);48
}49
}50
鎵撳嵃緇撴灉錛?br />
Tree Leaf
Leaf Leaf
Leaf, t Leaf
10
5
Tree, t Leaf
3
5
------------------
10
Tree Leaf
Leaf Leaf
3
10
xunSir.lee 2008-08-18 22:13 鍙戣〃璇勮
]]>