diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson1.class" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson1.class"
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diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson2.class" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson2.class"
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diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson3.class" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson3.class"
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diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson4.class" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson4.class"
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diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/3.5\347\254\224\350\256\260.docx" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/3.5\347\254\224\350\256\260.docx"
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diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson1.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson1.class"
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diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson2.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson2.class"
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diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson3.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson3.class"
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diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson4.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson4.class"
new file mode 100644
index 0000000000000000000000000000000000000000..ad08261f9417a2f5ed691141a89c680e5a30b2a7
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/lesson4.class" differ
diff --git "a/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon1.java" "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..ee358208703aec4133eaae535091104e4f7065e5
--- /dev/null
+++ "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon1.java"
@@ -0,0 +1,19 @@
+import java.util.Scanner;
+
+public class Demon1 {
+
+	public static void main(String[] args) {
+
+		Scanner scanner=new Scanner(System.in);
+		int a ;                                                                                                                                                                                                                                                                                                       
+		int b ;
+		System.out.println("请输入第一个数字：");
+		a=scanner.nextInt();
+		System.out.println("请输入第二个数字：");
+		b=scanner.nextInt();
+        int c=a<b?a:b;
+		System.out.println("输出最小的数字是"+c);
+
+	}
+
+}
diff --git "a/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon2.java" "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..abf890a389a26d60e9dfef32f66b9c67a99efdc8
--- /dev/null
+++ "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon2.java"
@@ -0,0 +1,17 @@
+import java.util.Scanner;
+
+public class Demon2 {
+
+	public static void main(String[] args) {
+
+		int a;
+		
+		Scanner scan=new Scanner(System.in);		
+		System.out.println("请输入一个数字：");
+		a=scan .nextInt();
+		String b = (a % 2 <=0)?"偶数":"奇数";
+		System.out.println(b);
+		
+	}
+
+}
diff --git "a/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon3.java" "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..51aecce95384024332e3f008d296d5f9a20d7be5
--- /dev/null
+++ "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon3.java"
@@ -0,0 +1,19 @@
+import java.util.Scanner;
+
+public class Demon3 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		Scanner scan=new Scanner(System.in);
+		int a;
+		int b;
+		int height1=150;
+		int height2=165;
+		int height3=210;
+		a= height1<height2?height2:height1;
+		b=height2<height3?height3:height2;
+		System.out.println("三个和尚最高的是"+b);
+	}
+
+}
diff --git "a/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon4.java" "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..9d112d3d706778420e18b0b602ad5c33a2529da6
--- /dev/null
+++ "b/Java\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\206\212\346\226\207\351\221\253/Demon4.java"
@@ -0,0 +1,26 @@
+import java.util.Scanner;
+
+public class Demon4 {
+
+	public static void main(String[] args) {
+	    Scanner scanner = new Scanner(System.in);
+	    
+	    System.out.println("注册页面》》》》》》");
+	    String userName = scanner.next();
+	    
+	    System.out.println("请输入密码：");
+	    int pass1 = scanner.nextInt();
+	    
+	    System.out.println("请再次输入密码");
+	    int pass2 = scanner.nextInt();
+	    
+	    if (pass1==pass2) {
+	    	System.out.println("恭喜您注册成功");
+	    }
+	    if (pass1!=pass2) {
+	    	System.out.println("对不起您两次输入的密码不一致，请重新输入");
+	    }
+	    System.out.println("程序结束！");
+	}
+
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon.java"
new file mode 100644
index 0000000000000000000000000000000000000000..3a5a9b773d5b331bcc5089d23a038097f10c5f4c
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon.java"
@@ -0,0 +1,29 @@
+import java.util.Scanner;
+
+public class Demon {
+
+	public static void main(String[] args) {
+		//算数运算符
+		int num1 = 10;
+		int num2 = 5;
+		
+		Scanner scan=new Scanner(System.in); 
+		
+		
+		System.out.println("请输入第一个数字：");
+		num1 = scan.nextInt();
+		
+		System.out.println("请输入第二个数字：");
+		num2 = scan.nextInt();
+		
+		//求两数之和
+		System.out.println("num1+num2="+(num1+num2));
+		System.out.println("num1-num2="+(num1-num2));
+		System.out.println("num1*num2="+(num1*num2));
+		System.out.println("num1/num2="+(num1+num2));
+		System.out.println("num1%num2="+(num1%(float)num2));
+		
+
+	}
+
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon2.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..19d3d3a6ff2d7cbd30f76a385b388d2e9534d1c8
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/Demon2.java"
@@ -0,0 +1,21 @@
+
+public class Demon2 {
+
+	public static void main(String[] args) {
+
+		int num = 5632;
+		
+		
+		int num1 = num/1000;
+		int num2 = num/100%10;
+		int num3 = num%1000%100/10;
+		int num4= num%1000%100%10;
+		
+		
+		System.out.println(num1);
+		System.out.println(num2);
+		System.out.println(num3);
+		System.out.println(num4);
+	}
+
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\215\216\346\221\204\346\260\217\345\272\246.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\215\216\346\221\204\346\260\217\345\272\246.java"
new file mode 100644
index 0000000000000000000000000000000000000000..84cc4a5245b1fd2364d0d998f0206f77515cb3f4
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\215\216\346\221\204\346\260\217\345\272\246.java"
@@ -0,0 +1,21 @@
+import java.util.Scanner;
+
+public class 华摄氏度 {
+
+	public static void main(String[] args) {
+
+		double C;
+		double F;
+		Scanner scan=new Scanner(System.in);
+		System.out.println("请输入华氏度的值：");
+        F =scan.nextDouble();
+        C =(F-32)*((double)5/9);
+        System.out.println("摄氏温度为"+C);
+        		
+	
+		
+		 
+	}
+
+}
+ 
\ No newline at end of file
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\234\206\347\232\204\350\277\220\347\256\227.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\234\206\347\232\204\350\277\220\347\256\227.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6088b5d7fc6fd8b8dbe3a24eef369a60d28468c2
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\345\234\206\347\232\204\350\277\220\347\256\227.java"
@@ -0,0 +1,19 @@
+import java.util.Scanner;
+
+public class 圆的运算 {
+
+	public static void main(String[] args) {
+
+		int r;
+		double π;
+		Scanner scn = new Scanner (System.in);
+		System.out.println("请输入半径r值：");
+		r =scn .nextInt();
+		π= 3.14;
+		System.out.println("圆的面积是："+r*r*π);
+		
+		
+		
+	}
+
+}