내가보다는, 당신이 toString을 구현하는 것이 좋습니다 전순으로 다음 트리를 입력 (node.data)
클래스 treeprinter
에를 보내 도움을 분류
import java.io.IOException;
import java.io.OutputStreamWriter;
public class TreePrinter {
public static class Node<T extends Comparable<T>> {
T value;
Node<T> left, right;
public void insertToTree(T v) {
if (value == null) {
value = v;
return;
}
if (v.compareTo(value) < 0) {
if (left == null) {
left = new Node<T>();
}
left.insertToTree(v);
} else {
if (right == null) {
right = new Node<T>();
}
right.insertToTree(v);
}
}
public void printTree(OutputStreamWriter out) throws IOException {
if (right != null) {
right.printTree(out, true, "");
}
printNodeValue(out);
if (left != null) {
left.printTree(out, false, "");
}
}
private void printNodeValue(OutputStreamWriter out) throws IOException {
if (value == null) {
out.write("<null>");
} else {
out.write(value.toString());
}
out.write('\n');
}
private void printTree(OutputStreamWriter out, boolean isRight, String indent) throws IOException {
if (right != null) {
right.printTree(out, true, indent + (isRight ? " " : " | "));
}
out.write(indent);
if (isRight) {
out.write("┌");
} else {
out.write("└");
}
out.write("────");
printNodeValue(out);
if (left != null) {
left.printTree(out, false, indent + (isRight ? " | " : " "));
}
}}}
노드 이 TreePrinter.
Node 클래스를 약간 변경하고 SortTree 바깥으로 옮겨 코드를 https://github.com/johanwitters/stackoverflow-tree-printer에서 사용할 수있게되었습니다.
노드의 구현은 여기에 있습니다 : 나는 희망
public class TestSortTree {
@Test
public void test() {
Node node = new Node(1);
Node left = new Node(2);
Node leftLeft = new Node(22);
Node leftRight = new Node(23);
Node leftRightLeft = new Node(24);
left.setLeft(leftLeft);
leftRight.setLeft(new Node(39));
left.setRight(leftRight);
node.setLeft(left);
node.setRight(new Node(3));
System.out.println(node.toString());
}
}
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이
을하는 데 도움이 :
package com.johanw.stackoverflow.tree;
import com.johanw.stackoverflow.util.Helper;
public class Node<A extends Comparable>{
private static int AMOUNT_INDENT = 3;
private int data;
private Node left, right;
public Node(int d) {
data = d;
left = null;
right = null;
}
public void setLeft(Node left) {
this.left = left;
}
public void setRight(Node right) {
this.right = right;
}
public int getData() {
return data;
}
public Node getLeft() {
return left;
}
public Node getRight() {
return right;
}
public void indent(StringBuilder builder, int indent) {
builder.append(Helper.repeat(indent * (AMOUNT_INDENT + 1), " "));
}
public void newLine(StringBuilder builder) {
builder.append(System.lineSeparator());
}
public String toString(int indent) {
StringBuilder builder = new StringBuilder();
builder.append(data);
newLine(builder);
if (left != null) {
indent(builder, indent);
builder.append("└" + Helper.repeat(AMOUNT_INDENT, "─") + left.toString(indent + 1));
}
if (right != null) {
indent(builder, indent);
builder.append("└" + Helper.repeat(AMOUNT_INDENT, "─") + right.toString(indent + 1));
}
return builder.toString();
}
@Override
public String toString() {
return toString(0);
}
}
아래의 단위 테스트는 주어진 트리 구조의 하단에 출력을 제공