StudentMain.java - public class StudentMain private static...

public class StudentMain {
private static <T> void print(Stack<T> st) {
System.out.println("------------");
if (st == null) {
System.out.println("null");
} else if (st.empty()) {
System.out.println("Empty stack");
} else {
Stack<T> ts = new LinkedStack<T>();
while (!st.empty()) {
T e = st.pop();
System.out.println(e);
ts.push(e);
}
while (!ts.empty()) {
st.push(ts.pop());
}
}
System.out.println("------------");
}
private static void testInFixExp() {
}
public static void main(String[] args) {
// Postfix
{
String exp = "3 5 + 4 4 - /";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
print(pfe.evaluate(6));
}
{
String exp = "3 5 + 4 4 - /";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
print(pfe.evaluate(7));
}
{
String exp = "3 5 + 4 2 - *";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
System.out.println("Error at: " + pfe.validate());
}
{
String exp = "3 5 + 4 4 - /";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
System.out.println("Error at: " + pfe.validate());
}
{
String exp = "3 5 + 4 2 -";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
System.out.println("Error at: " + pfe.validate());
}
{
String exp = "3 5 + 4 2 - >=";
PostFixExp pfe = new PostFixExpImp();
pfe.setExp(exp);
InFixExp ife = pfe.toInFix();

System.out.println(ife.getExp());
}
// Infix
{
String exp = "3 - 2";