Searching in a BST
public class Search {
public static class Node {
int data;
Node left, right;
Node(int data) {
this.data = data;
}
}
public static Node Insert(Node root, int val) {
if (root == null) {
root = new Node(val);
return root;
}
if (root.data < val) {
root.right = Insert(root.right, val);
} else {
root.left = Insert(root.left, val);
}
return root;
}
public static boolean search(Node root, int key) {
if (root == null) {
return false;
}
if (root.data == key) {
return true;
}
if (root.data < key) {
return search(root.right, key);
} else {
return search(root.left, key);
}
}
public static void main(String[] args) {
int values[] = { 5, 1, 3, 4, 2, 7 };
Node root = null;
for (int i = 0; i < values.length; i++) {
root = Insert(root, values[i]);
}
if (search(root, 4)) {
System.out.println("element found");
} else {
System.out.println("Element not found");
}
}
}
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