平台Scanner测试

Author: enjoyCoding666

src/main/java/com/base/ScannerDemo.java

@@ -0,0 +1,14 @@
+package com.base;
+
+
+import java.util.Scanner;
+
+public class ScannerDemo {
+    public static void main(String[] args) {
+        //输入输出，牛客网之类的平台会用到
+        Scanner scanner = new Scanner(System.in);
+        while (scanner.hasNext()) {
+            System.out.println(scanner.next());
+        }
+    }
+}

src/main/java/com/string/SpecialString.java

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+package com.string;
+
+import java.util.Scanner;
+
+public class SpecialString {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        while (scanner.hasNext()) {
+            System.out.println(isTarget(scanner.next()));
+        }
+    }
+
+    /**
+     * 判断是否回文字符串
+     *
+     */
+    public static boolean isTarget(String str) {
+        if (str==null) {
+            return false;
+        }
+        boolean isTar = true;
+        //双指针
+        int length = str.length();
+        for (int i = 0; i < length; i++) {
+            if (str.charAt(i) != str.charAt(length-1-i)) {
+                return false;
+            }
+        }
+        return isTar;
+    }
+
+}

src/test/java/com/string/SolutionTest.java

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+package com.string;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SolutionTest {
+
+    /**
+     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
+     *
+     *  一个数如果恰好等于它的因子之和。6=1+2+3.
+     *
+     * @param wanCount int整型 10000以内
+     * @return int整型ArrayList
+     */
+    public ArrayList<Integer> fun (int wanCount) {
+        // write code here
+        ArrayList<Integer> list = new ArrayList<>();
+        if (wanCount==0 || wanCount==1) {
+            list.add(wanCount);
+            return list;
+        }
+        for (int i = 1; i <= wanCount; i++) {
+            //从1开始一直遍历到 i
+            int sum = i;
+            for (int j = 1; j < i; j++) {
+                if (i%j==0) {
+                    sum-=j;
+                }
+            }
+            if(sum==0) {
+                list.add(i);
+            }
+        }
+        return list;
+
+    }
+
+}