-
Notifications
You must be signed in to change notification settings - Fork 7
/
TestStack.java
61 lines (49 loc) · 1.4 KB
/
TestStack.java
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
package chapter7;
//This class defines an integer stack that can hold 10 values
class Stack {
/* Now both stck and tos are private .This means that they can not be accidentaly or maliciously altered
* in a way that would be harmful to the stack*/
private int stck[] = new int[10];
private int tos;
Stack() {
tos = -1;
}
void push(int item) {
if (tos == 9) {
System.out.println("Stack is full");
} else {
stck[++tos] = item;
}
}
int pop() {
if (tos < 0) {
System.out.println("Stack underflow");
return 0;
} else {
return stck[tos--];
}
}
}
public class TestStack {
public static void main(String[] args) {
Stack myStack1 = new Stack();
Stack myStack2 = new Stack();
//Push some numbers onto stack
for (int i = 0; i < 10; i++) {
myStack1.push(i);
}
for (int j = 10; j < 20; j++) {
myStack2.push(j);
}
System.out.println("Stack in myStack1");
for (int i = 0; i < 10; i++) {
System.out.println(myStack1.pop());
}
System.out.println("Stack in myStack2");
for (int j = 10; j < 20; j++) {
System.out.println(myStack2.pop());
}
//This is illegal, since instances are private.
//myStack1.tos=5;
}
}