常见格式转换及单测

Author: enjoyCoding666

src/main/java/com/base/BigDecimalInitTest.java

@@ -0,0 +1,18 @@
+package com.base;
+
+import java.math.BigDecimal;
+
+/**
+ * @Auther: Administrator
+ * @Date: 2019\9\3 0003 0:24
+ * @Description:
+ */
+public class BigDecimalInitTest {
+    public static void main(String[] args) {
+        BigDecimal amount1=new BigDecimal("0.06");
+        BigDecimal amount2=new BigDecimal(0.06);
+        System.out.println(amount1);
+        System.out.println(amount2);
+    }
+}
+

src/main/java/com/base/IntegerDemo2.java

@@ -0,0 +1,18 @@
+package com.base;
+
+/**
+ * @Auther: Administrator
+ * @Date: 2019\8\27 0027 23:13
+ * @Description:
+ */
+public class IntegerDemo2 {
+
+    public static void main(String[] args) {
+        Integer integer1=129;
+        Integer integer2=129;
+
+        if(integer1.intValue()==integer2.intValue()){
+            System.out.println("test");
+        }
+    }
+}

src/main/java/com/collection/ListOperation.java

@@ -1,5 +1,7 @@
 package com.collection;
 
+import java.lang.reflect.Array;
+import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 
@@ -30,4 +32,12 @@ public void ergodicByIterator(List<String> list){
     }
 
 
+    public List arraysToList(String[] strArray){
+        return Arrays.asList(strArray);
+    }
+
+    public Object[] listToArrays(List<String> list){
+       return list.toArray();
+    }
+
 }

src/main/java/com/regex/ReplaceAllDemo.java

@@ -0,0 +1,13 @@
+package com.regex;
+
+/**
+ * @Auther: Administrator
+ * @Date: 2019\12\8 0008 16:33
+ * @Description:
+ */
+public class ReplaceAllDemo {
+    public static void main(String[] args) {
+        String test="123abc45def";
+        System.out.println(test.replaceAll("\\d+",""));
+    }
+}

src/main/java/com/string/WordsAmount.java

@@ -14,7 +14,7 @@ public class WordsAmount {
     public static void main(String[] args) {
         String str="apple 1 banana  2pear 23 banana pear pear";
         Map wordsMap=countEachWorld(str);
-        printMap( wordsMap );      ;
+        printMap( wordsMap );
     }
     //计算字符串中每一个单词出现的个数
     public static Map countWords(String str){

src/test/java/com/collection/ArrayListTest.java

@@ -0,0 +1,15 @@
+package com.collection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @Auther: Administrator
+ * @Date: 2019\8\13 0013 0:08
+ * @Description:
+ */
+public class ArrayListTest {
+    public static void main(String[] args) {
+        List list=new ArrayList(100);
+    }
+}

src/test/java/com/json/JsonTest.java

@@ -0,0 +1,29 @@
+package com.json;
+
+import net.sf.json.JSONArray;
+import net.sf.json.JSONObject;
+
+/**
+ * @Auther: Administrator
+ * @Date: 2019\7\10 0010 23:31
+ * @Description:
+ */
+public class JsonTest {
+    public static void main(String[] args) {
+        JSONArray jsonArray=new JSONArray();
+        JSONObject jsonObject=new JSONObject();
+        jsonObject.put("name","lin");
+        jsonObject.put("age",100);
+        jsonArray.add(jsonObject);
+//        for(int i=0;i<jsonArray.size();i++){
+//            JSONObject jsonobject=jsonArray.getJSONObject(i);
+//            System.out.println(jsonobject.getString("name"));
+//        }
+        for (Object user:jsonArray){
+            String name= ((JSONObject) user).getString("name");
+            System.out.println(name);
+        }
+
+
+    }
+}