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-rw-r--r--csci1913/Java/lab10_strap012.java53
1 files changed, 46 insertions, 7 deletions
diff --git a/csci1913/Java/lab10_strap012.java b/csci1913/Java/lab10_strap012.java
index c8fea79..06c0dfa 100644
--- a/csci1913/Java/lab10_strap012.java
+++ b/csci1913/Java/lab10_strap012.java
@@ -7,30 +7,69 @@ class AssociationList<Key, Value> {
key=k; value=v; next=n;
}
}
+ private Node head;
public AssociationList() {
- Node head = new Node("HEAD", "HEAD", null);
+ head = new Node(null, null, null);
}
public void delete(Key key) {
+ Node left = head;
+ Node right = head.next;
+ while (right!=null) {
+ if (isEqual(right.key, key)) {
+ left.next=right.next;
+ break;
+ } else {
+ left=right; right=right.next;
+ }
+ }
}
public Value get(Key key) {
-
+ Node where=head.next;
+ while (where!=null) {
+ if (isEqual(where.key,key)) {
+ return where.value;
+ } else {
+ where=where.next;
+ }
+ } //No matching key found
+ throw new IllegalArgumentException();
}
private boolean isEqual(Key leftKey, Key rightKey) {
if (leftKey == null || rightKey == null) {
return leftKey == rightKey;
} else {
- return leftkey.equals(rightKey);
+ return leftKey.equals(rightKey);
}
}
public boolean isIn(Key key) {
-
+ Node where = head.next;
+ while (where != null) {
+ if (isEqual(where.key, key)) {
+ return true;
+ } else {
+ where = where.next;
+ }
+ } // No matching key found
+ return false;
}
public void put(Key key, Value value) {
-
+ Node where=head.next;
+ boolean found=false;
+ while (where!=null){
+ if(isEqual(key, where.key)) {
+ where.value=value;
+ found=true;
+ break;
+ } else {
+ where=where.next;
+ }
+ } //End of while
+ if (!found) {
+ Node temp=head.next;
+ head.next= new Node(key, value, temp);
+ }
}
-
-
}
//