FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
Java/DataStructures/Trees/AVLTree.java at master · estar12/Java · GitHub
estar12
/
Java
Public
forked from
TheAlgorithms/Java
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Pull requests
0
Actions
Projects
Security and quality
0
Insights
Additional navigation options
Code
Pull requests
Actions
Projects
Security and quality
Insights
Expand file tree
Breadcrumbs
Java
/
DataStructures
/
Trees
/
AVLTree.java
Copy path
More file actions
More file actions
Latest commit
History
History
History
213 lines (173 loc) · 4.9 KB
Breadcrumbs
Java
/
DataStructures
/
Trees
/
AVLTree.java
Copy path
File metadata and controls
213 lines (173 loc) · 4.9 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
public
class
AVLTree
{
private
Node
root
;
private
class
Node
{
private
int
key
;
private
int
balance
;
private
int
height
;
private
Node
left
,
right
,
parent
;
Node
(
int
k
,
Node
p
) {
key
=
k
;
parent
=
p
;
}
}
public
boolean
insert
(
int
key
) {
if
(
root
==
null
)
root
=
new
Node
(
key
,
null
);
else
{
Node
n
=
root
;
Node
parent
;
while
(
true
) {
if
(
n
.
key
==
key
)
return
false
;
parent
=
n
;
boolean
goLeft
=
n
.
key
>
key
;
n
=
goLeft
?
n
.
left
:
n
.
right
;
if
(
n
==
null
) {
if
(
goLeft
) {
parent
.
left
=
new
Node
(
key
,
parent
);
}
else
{
parent
.
right
=
new
Node
(
key
,
parent
);
}
rebalance
(
parent
);
break
;
}
}
}
return
true
;
}
private
void
delete
(
Node
node
){
if
(
node
.
left
==
null
&&
node
.
right
==
null
){
if
(
node
.
parent
==
null
)
root
=
null
;
else
{
Node
parent
=
node
.
parent
;
if
(
parent
.
left
==
node
){
parent
.
left
=
null
;
}
else
parent
.
right
=
null
;
rebalance
(
parent
);
}
return
;
}
if
(
node
.
left
!=
null
){
Node
child
=
node
.
left
;
while
(
child
.
right
!=
null
)
child
=
child
.
right
;
node
.
key
=
child
.
key
;
delete
(
child
);
}
else
{
Node
child
=
node
.
right
;
while
(
child
.
left
!=
null
)
child
=
child
.
left
;
node
.
key
=
child
.
key
;
delete
(
child
);
}
}
public
void
delete
(
int
delKey
) {
if
(
root
==
null
)
return
;
Node
node
=
root
;
Node
child
=
root
;
while
(
child
!=
null
) {
node
=
child
;
child
=
delKey
>=
node
.
key
?
node
.
right
:
node
.
left
;
if
(
delKey
==
node
.
key
) {
delete
(
node
);
return
;
}
}
}
private
void
rebalance
(
Node
n
) {
setBalance
(
n
);
if
(
n
.
balance
== -
2
) {
if
(
height
(
n
.
left
.
left
) >=
height
(
n
.
left
.
right
))
n
=
rotateRight
(
n
);
else
n
=
rotateLeftThenRight
(
n
);
}
else
if
(
n
.
balance
==
2
) {
if
(
height
(
n
.
right
.
right
) >=
height
(
n
.
right
.
left
))
n
=
rotateLeft
(
n
);
else
n
=
rotateRightThenLeft
(
n
);
}
if
(
n
.
parent
!=
null
) {
rebalance
(
n
.
parent
);
}
else
{
root
=
n
;
}
}
private
Node
rotateLeft
(
Node
a
) {
Node
b
=
a
.
right
;
b
.
parent
=
a
.
parent
;
a
.
right
=
b
.
left
;
if
(
a
.
right
!=
null
)
a
.
right
.
parent
=
a
;
b
.
left
=
a
;
a
.
parent
=
b
;
if
(
b
.
parent
!=
null
) {
if
(
b
.
parent
.
right
==
a
) {
b
.
parent
.
right
=
b
;
}
else
{
b
.
parent
.
left
=
b
;
}
}
setBalance
(
a
,
b
);
return
b
;
}
private
Node
rotateRight
(
Node
a
) {
Node
b
=
a
.
left
;
b
.
parent
=
a
.
parent
;
a
.
left
=
b
.
right
;
if
(
a
.
left
!=
null
)
a
.
left
.
parent
=
a
;
b
.
right
=
a
;
a
.
parent
=
b
;
if
(
b
.
parent
!=
null
) {
if
(
b
.
parent
.
right
==
a
) {
b
.
parent
.
right
=
b
;
}
else
{
b
.
parent
.
left
=
b
;
}
}
setBalance
(
a
,
b
);
return
b
;
}
private
Node
rotateLeftThenRight
(
Node
n
) {
n
.
left
=
rotateLeft
(
n
.
left
);
return
rotateRight
(
n
);
}
private
Node
rotateRightThenLeft
(
Node
n
) {
n
.
right
=
rotateRight
(
n
.
right
);
return
rotateLeft
(
n
);
}
private
int
height
(
Node
n
) {
if
(
n
==
null
)
return
-
1
;
return
n
.
height
;
}
private
void
setBalance
(
Node
...
nodes
) {
for
(
Node
n
:
nodes
) {
reheight
(
n
);
n
.
balance
=
height
(
n
.
right
) -
height
(
n
.
left
);
}
}
public
void
printBalance
() {
printBalance
(
root
);
}
private
void
printBalance
(
Node
n
) {
if
(
n
!=
null
) {
printBalance
(
n
.
left
);
System
.
out
.
printf
(
"%s "
,
n
.
balance
);
printBalance
(
n
.
right
);
}
}
private
void
reheight
(
Node
node
){
if
(
node
!=
null
){
node
.
height
=
1
+
Math
.
max
(
height
(
node
.
left
),
height
(
node
.
right
));
}
}
public
static
void
main
(
String
[]
args
) {
AVLTree
tree
=
new
AVLTree
();
System
.
out
.
println
(
"Inserting values 1 to 10"
);
for
(
int
i
=
1
;
i
<
10
;
i
++)
tree
.
insert
(
i
);
System
.
out
.
print
(
"Printing balance: "
);
tree
.
printBalance
();
}
}
Back
|
FazBrowse Home
|
New Git URL