diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo1.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..01fd51568b19d47c515a93bf058adbea17dd36ea
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo1.java"
@@ -0,0 +1,18 @@
+package md.com;
+
+public class Demo1 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+         int [][] arr =  {{11, 22, 33}, {33, 44, 55}};
+         for (int i = 0; i < arr.length; i++) {
+			System.out.println(arr[0][0]);
+			System.out.println(arr[0][1]);
+			System.out.println(arr[0][2]);
+			System.out.println(arr[1][0]);
+			System.out.println(arr[1][1]);
+			System.out.println(arr[1][2]);
+	}
+
+}
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo2.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a87335dc4863f39da7f8cc69ef44332a336b0c55
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo2.java"
@@ -0,0 +1,21 @@
+package md.com;
+
+public class Demo2 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+        int arr[] = {22,66,44};
+        int arr1[] = {77,33,88};
+        int arr2[] = {25,45,65};
+        int arr3[] = {11,66,99};
+        int arr4[] [] = {arr,arr1,arr2,arr3,};
+        int sum = 0;
+        for (int i = 0; i < arr4.length; i++) {
+			for (int j = 0; j < arr4[i].length; j++) {
+				sum  = sum + arr4[i][j]; 
+			}
+		}
+        System.out.println(sum); 
+	}
+
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo3.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..acf1c840f4da7df94b8a9ed8b72662edcb4e8fbc
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo3.java"
@@ -0,0 +1,40 @@
+package md.com;
+
+import java.util.Scanner;
+
+public class Demo3 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner sc = new Scanner(System.in);
+		int[][] arr = new int[5][5];
+		for (int i = 0; i < arr.length; i++) {
+			int b1 = i + 1;
+			System.out.println("请输入第" + b1 + "个员工的编号:");
+			int a = sc.nextInt();
+			arr[i][0] = a;
+			System.out.println("请输入第" + b1 + "个员工的忘打卡次数：");
+			int b = sc.nextInt();
+			arr[i][1] = b;
+			System.out.println("请输入第" + b1 + "个员工的迟到次数：");
+			int c = sc.nextInt();
+			arr[i][2] = c;
+			System.out.println("请输入第" + b1 + "个员工的早到次数：");
+			int d = sc.nextInt();
+			arr[i][3] = d;
+			System.out.println("请输入第" + b1 + "个员工的旷工次数：");
+			int e = sc.nextInt();
+			arr[i][4] = e;
+
+		}
+		System.out.println("***********本月考勤信息**********");
+		System.out.print("员工编号\t忘打卡\t迟到\t早到\t旷工\t总罚款(单位元)");
+		System.out.println();
+		for (int i = 0; i < arr.length; i++) {
+			int sum = arr[i][1] * 10 + arr[i][2] * 20 + arr[i][3] * 20 + arr[i][4] * 100;
+			System.out.print(arr[i][0] + "    " + arr[i][1] + "    " + arr[i][2] + "    " + arr[i][3] + "    "+ arr[i][4] + "    "+sum);
+			System.out.println();
+		}
+	}
+
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo4.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..d22f904ae03b47ec469fd337145a67c1c578c93f
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\350\256\270\350\207\252\346\246\225/Demo4.java"
@@ -0,0 +1,44 @@
+package md.com;
+
+import java.util.Scanner;
+
+public class Demo4 {
+	//1.一家贸易公司有四位销售员，每位销售员负责销售四件商品，编写一个程序，接收每名销售员销售的各类产品的数量。打印产品销售明细表，明细表包括每类产品的销售总数，以及每位销售员销售的产品数量占总销售的百分比。
+	//使用以下公式：
+	//销售员N销售的产品A的百分比=（销售员N售出的产品A的销售量/总销售量）*100
+	//总销售量指各类产品销售量的总和（使用二维数组）
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner sc = new Scanner(System.in);
+		int [][]arr = new int [4][5];
+		Double sum = (double) 0;
+		for (int i = 0; i < arr.length; i++) {
+			int b1  = i+1;
+			System.out.println("请输入第" + b1 + "名销售员的第一件产品销售量");
+			int a =sc.nextInt();
+			arr[i][0] = a;
+			System.out.println("请输入第" + b1 + "名销售员的第二件产品销售量");
+			int b =sc.nextInt();
+			arr[i][1] = b;
+			System.out.println("请输入第" + b1 + "名销售员的第三件产品销售量");
+			int c =sc.nextInt();
+			arr[i][2] = c;
+			System.out.println("请输入第" + b1 + "名销售员的第四件产品销售量");
+			int d =sc.nextInt();
+			arr[i][3] = d;
+			sum=arr[i][i+1]+sum;
+		}
+		System.out.println("***********各类产品销售总和**********");
+		System.out.print("第一件\t第二件\t第三件\t第四件\t总和");
+		System.out.println();
+		for (int i = 0; i < arr.length; i++) {
+		System.out.print("   "+arr[i][0] + "          " 
+			+ arr[i][1] + "              " + arr[i][2] + "            " 
+			+ arr[i][3] + "            " 
+			+((arr[i][1]+arr[i][2]+arr[i][3]+)/sum));");
+			System.out.println();
+		}
+		
+	}
+
+}