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89 lines (75 loc) · 2.04 KB
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package Algorithm;
public class tree {
public static void main(String[] args){
Node root=new Node();
Node left1=new Node();
Node leftright1=new Node();
Node leftleft1=new Node();
Node right1=new Node();
Node rightleft1=new Node();
Node rightright1=new Node();
root.setVal(1);
left1.setVal(2);
right1.setVal(3);
leftleft1.setVal(4);
leftright1.setVal(5);
rightleft1.setVal(6);
rightright1.setVal(7);
root.setLeft(left1);
root.setRight(right1);
left1.setLeft(leftleft1);
left1.setRight(leftright1);
right1.setLeft(rightleft1);
right1.setRight(rightright1);
preIter(root);
System.out.println();
midIter(root);
System.out.println();
backIter(root);
}
static class Node{
public int getVal() {
return val;
}
public void setVal(int val) {
this.val = val;
}
public Node getLeft() {
return left;
}
public void setLeft(Node left) {
this.left = left;
}
public Node getRight() {
return right;
}
public void setRight(Node right) {
this.right = right;
}
private int val;
private Node left;
private Node right;
}
private Node root;
public tree(Node root) {
this.root = root;
}
public static void preIter(Node root){
if(root==null) return;
System.out.print(root.getVal()+" ");
preIter(root.getLeft());
preIter(root.getRight());
}
public static void midIter(Node root){
if(root==null) return;
midIter((root.getLeft()));
System.out.print(root.getVal()+" ");
midIter(root.getRight());
}
public static void backIter(Node root){
if(root==null) return;
backIter(root.getLeft());
backIter(root.getRight());
System.out.print(root.getVal()+" ");
}
}