Initial commit

.gitignore

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+# Project exclude paths
+/out/

JavaProjects.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library name="JUnit4">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.13.1/junit-4.13.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>

MY/MY.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library name="JUnit4">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.13.1/junit-4.13.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>

MY/src/com/mjz/Main.java

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+package com.mjz;
+
+import org.junit.Test;
+
+/**
+ * @PACKAGE_NAME: com.mjz
+ * @author: JHZZ
+ * @date: 2021/11/4 23:24
+ * @PROJECT_NAME: JavaProjects
+ */
+public class Main {
+    public static void main(String[] args) {
+
+        MyLinkList mll = new MyLinkList();
+        for (int i = 1; i <= 10 ; i++) {
+            mll.addLast(i);
+        }
+        mll.print();
+        mll.deleteFirst();
+        mll.print();
+        mll.addFirst(4);
+        mll.print();
+        mll.deleteLast();
+        mll.deleteFirst();
+        mll.print();
+        System.out.println(test());
+    }
+
+    public static int test(){
+        try {
+            int n=10;
+            int i = n / 0;
+            return 10;
+        }catch(Exception e){
+            System.out.println(e.getStackTrace());
+        }finally {
+            System.out.println("finally");
+            return 20;
+        }
+    }
+}

MY/src/com/mjz/MyArrays.java

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+package com.mjz;
+
+/**
+ * @PACKAGE_NAME: com.mjz
+ * @author: JHZZ
+ * @date: 2021/11/4 23:13
+ * @PROJECT_NAME: JavaProjects
+ */
+public class MyArrays {
+    private int capacity = 10;
+    private int length = 0;
+    private int[] arr;
+
+    public MyArrays() {
+        arr = new int[10];
+    }
+
+    public MyArrays(int capacity) {
+        this.capacity = capacity;
+        arr = new int[capacity];
+    }
+
+    public MyArrays(int[] arr) {
+        this.arr = arr;
+    }
+
+    public int get(int index){
+        return arr[index];
+    }
+    public int getLength() {
+        return length;
+    }
+
+    public int getCapacity() {
+        return capacity;
+    }
+
+    public void insert(int val) {
+        if (capacity == length){
+            //扩容操作
+            System.out.println("扩容操作");
+            int[] newarr=new int[arr.length*2];
+            newarr  = arr.clone();
+            arr=newarr;
+
+        }else{
+            arr[length++] = val;
+        }
+    }
+    public int remove(int index) {
+        if (index >= capacity && index < 0){
+            return -1;
+        }else if(index >= length){
+            return -1;
+        }
+        for (int i = index; i <length ; i++) {
+            arr[i] = arr[i+1];
+        }
+
+        length--;
+        return arr[index];
+    }
+    public void print(){
+        System.out.print("[");
+        for (int i = 0; i < length; i++) {
+            System.out.print(arr[i]+" ");
+        }
+        System.out.println("]");
+    }
+}