基本数据结构

group04/1796244932/.gitignore

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+.metadata/
+RemoteSystemsTempFiles/
+.recommenders/
+
+*.iml
+
+# Created by https://www.gitignore.io/api/eclipse,intellij,java
+
+### Eclipse ###
+
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+
+# Eclipse Core
+.project
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# PyDev specific (Python IDE for Eclipse)
+*.pydevproject
+
+# CDT-specific (C/C++ Development Tooling)
+.cproject
+
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+# Java annotation processor (APT)
+.factorypath
+
+# PDT-specific (PHP Development Tools)
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# Tern plugin
+.tern-project
+
+# TeXlipse plugin
+.texlipse
+
+# STS (Spring Tool Suite)
+.springBeans
+
+# Code Recommenders
+.recommenders/
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+*/.idea/
+# Sensitive or high-churn files:
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+
+# Gradle:
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Mongo Explorer plugin:
+.idea/**/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# End of https://www.gitignore.io/api/eclipse,intellij,java

group04/1796244932/learn01/.gitignore

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+.settings/
+/target/
+.classpath
+.project
+/bin/
+

group04/1796244932/learn01/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.dudy</groupId>
+  <artifactId>learn01</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <name>learn01</name>
+  <url>http://maven.apache.org</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.11</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+
+
+  <profiles>
+    <profile>
+      <id>jdk-1.8</id>
+      <activation>
+        <activeByDefault>true</activeByDefault>
+        <jdk>1.8</jdk>
+      </activation>
+      <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
+      </properties>
+    </profile>
+  </profiles>
+</project>

group04/1796244932/learn01/src/main/java/com/dudy/learn01/base/MyArrayList.java

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+package com.dudy.learn01.base;
+
+import java.util.Arrays;
+
+public class MyArrayList implements MyList {
+
+	private int size = 0;
+
+	private Object[] elementData = new Object[16];
+
+	/**
+	 * 增加元素: ①数组没满之前，直接添加到最后，满了扩容添加
+	 */
+	public void add(Object o) {
+		// 检查是否需要扩容
+		this.checkGrow(size + 1);
+		elementData[size++] = o;
+	}
+
+	/**
+	 * 检查是否需要扩容
+	 * 
+	 * @param newSize
+	 */
+	private void checkGrow(int newSize) {
+		if (newSize > elementData.length) {
+			this.grow(elementData);
+		}
+	}
+
+	/**
+	 * 扩容
+	 * 
+	 * @param oldElementData
+	 */
+	private void grow(Object[] oldElementData) {
+		int lenth = (int) (oldElementData.length * 1.5);
+		elementData = Arrays.copyOf(oldElementData, lenth);
+	}
+
+	/**
+	 * 根据索引添加:①同 add ② 可能会出现 index 超出当前位置的情况 ③往 中间插入时需要移位
+	 */
+	public void add(int index, Object o) {
+		// 检查是否需要扩容
+		if (index > size || index < 0) {
+			throw new RuntimeException("Index: " + index + ", Size: " + size);
+		}
+		this.checkGrow(size + 1);
+		// 循环移位
+		int tmp = size;
+		for (int i = 0; i < size - index; i++) {
+			elementData[tmp] = elementData[tmp - 1];
+			tmp--;
+		}
+		// 索引位置赋值
+		elementData[index] = o;
+		size++;
+	}
+
+	/**
+	 * 直接返回相应数组下标就好
+	 */
+	public Object get(int index) {
+		return elementData[index];
+	}
+
+	/**
+	 * 删除元素:①注意移位
+	 */
+	public Object remove(int index) {
+		// 检查是否需要扩容
+		if (index > size || index < 0) {
+			throw new RuntimeException("Index: " + index + ", Size: " + size);
+		}
+		Object desc = elementData[index];
+
+		for (int i = 0; i < size - index; i++) {
+			elementData[index] = elementData[index+1];
+			index++;
+		}
+		size--;
+		return desc;
+	}
+
+	public int size() {
+		return this.size;
+	}
+
+	public MyIterator iterator() {
+
+
+		return new MyItr();
+	}
+
+	public  class  MyItr implements  MyIterator{
+
+		int cursor;
+
+
+
+		public boolean hasNext() {
+			return  cursor != size;
+		}
+
+		public Object next() {
+
+			return elementData[cursor++];
+		}
+	}
+
+
+
+	@Override
+	public String toString() {
+		StringBuffer str = new StringBuffer();
+		str.append("[");
+		for (int i = 0; i < size; i++) {
+			str.append(elementData[i]+",");
+		}
+		str.append("]");
+		return str.toString();
+	}
+}

group04/1796244932/learn01/src/main/java/com/dudy/learn01/base/MyBinaryTree.java

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+package com.dudy.learn01.base;
+
+public class MyBinaryTree {
+
+	private Node root;
+
+	public Node getRoot() {
+		return root;
+	}
+
+	static class Node {
+		private int data;
+		private Node left;
+		private Node right;
+
+		public Node(int data) {
+			this.data = data;
+		}
+
+	}
+
+	public Node insert(int o) {
+		Node newNode = new Node(o);
+
+		if (root == null) {
+			root = newNode;
+			return newNode;
+		}
+		Node currentNode = root;
+
+		while (true) {
+			// System.out.println("currentNode: " + currentNode.data );
+			if (o <= currentNode.data) { // left
+
+				if (currentNode.left != null) {
+					currentNode = currentNode.left;
+				} else {
+					currentNode.left = newNode;
+					// System.out.println("left return ...");
+					// System.out.println("");
+					return newNode;
+				}
+			} else { // right
+				if (currentNode.right != null) {
+					currentNode = currentNode.right;
+				} else {
+					currentNode.right = newNode;
+					// System.out.println("right return ...");
+					// System.out.println("");
+					return newNode;
+				}
+			}
+
+		}
+
+	}
+
+	public  void display(Node root) {
+
+		System.out.print(root.data + " ");
+		if (root.left != null) {
+			display(root.left);
+		}
+		if (root.right != null) {
+			display(root.right);
+		}
+	}
+
+
+
+}

group04/1796244932/learn01/src/main/java/com/dudy/learn01/base/MyIterator.java

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+package com.dudy.learn01.base;
+public interface MyIterator {
+	public boolean hasNext();
+	public Object next();
+
+}