diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo1.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..ba4f9c87ab4c63b6c7c7cf9ebbaae22e41e86c09
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo1.java"
@@ -0,0 +1,18 @@
+package md.lesson01.com;
+
+public class Demo1 {
+
+	public static void main(String[] args) {
+		// 已知一个二维数组 arr = {{11, 22, 33}, {33, 44, 55}};
+		int [] []arr= {{11,22,33},{33,44,55}};
+		
+		for (int i = 0; i < arr.length; i++) {
+			for (int j = 0; j < arr[i].length; j++) {
+				System.out.println(arr[i][j]);
+			}
+			
+		}
+
+	}
+
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo2.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..263a68469e5168daac3bbddb062d0a467effbf03
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo2.java"
@@ -0,0 +1,33 @@
+package md.lesson01.com;
+
+public class Demo2 {
+
+	public static void main(String[] args) {
+		//  某公司季度和月份统计的数据如下：单位(万元)
+		//第一季度：22,66,44
+		//第二季度：77,33,88
+		//第三季度：25,45,65
+		//第四季度：11,66,99
+		
+		int [] arr1 = {22,66,44};
+		int [] arr2 = {77,33,88};
+		int [] arr3 = {25,45,65};
+		int [] arr4 = {11,66,99};
+		
+		int [] [] arr5 = {arr1,arr2,arr3,arr4};
+		
+		for (int i = 0; i < arr5.length; i++) {
+			
+			for (int j = 0; j < arr5[i].length; j++) {
+				System.out.println(arr5[i][j]);
+			}
+		}
+		int arr6 = 122;
+		int arr7 = 188;
+		int arr8 = 135;
+		int arr9 = 176;
+		int sum = arr6+ arr7 + arr8 +arr9;
+		System.out.println("sum="+sum);
+		
+	}
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo3.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..1fff69656a7aace003c033278219b6b3ba9755dd
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo3.java"
@@ -0,0 +1,39 @@
+package md.lesson01.com;
+
+import java.util.Scanner;
+
+public class Demo3 {
+
+	public static void main(String[] args) {
+		int [] [] arr = new int [5][6];
+		
+		Scanner scanner = new Scanner (System.in);
+		for (int i = 1; i < arr.length; i++) {
+			System.out.println("请输入第" + i + "位员工的编号：");
+			arr[i][0]  = scanner.nextInt();
+			System.out.println("请输入第" + i + "位员工的忘打卡次数：");	
+			arr[i][1] = scanner.nextInt();
+			System.out.println("请输入第" + i + "位员工的迟到次数：");	
+			arr[i][2] = scanner.nextInt();
+			System.out.println("请输入第" + i + "位员工的早退次数：");	
+			arr[i][3] = scanner.nextInt();
+			System.out.println("请输入第" + i + "位员工的旷工次数：");	
+			arr[i][4] = scanner.nextInt();
+			
+			arr[i][5] = arr[i][1]*10 + arr[i][2]*20 + arr[i][3]*20 + arr[i][4]*100;
+				
+			}
+			System.out.println("*************本月考勤信息**************");
+			System.out.println("员工编号\t忘打卡次数\t迟到次数\t早退次数\t矿工次数");
+			for (int i = 0; i < arr.length; i++) {
+				for (int j = 0; j < arr[i].length; j++) {
+					System.out.print(arr[i][j]+ "\t");
+				}
+				System.out.println();
+			}
+			
+			}
+		
+	}
+
+
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo4.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..7515331e754e0eef117dd9dd327128e4ca2c0906
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\345\274\240\345\256\217/Demo4.java"
@@ -0,0 +1,41 @@
+package md.lesson01.com;
+
+import java.util.Scanner;
+
+public class Demo4 {
+
+	public static void main(String[] args) {
+		//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）
+			int [][] arr = new int [5][4];
+			Scanner scanner = new Scanner(System.in);
+			for (int i = 1; i < arr.length; i++) {
+				for (int j = 1; j < arr[i].length; j++) {
+					System.out.println("请输入第" +i + "位销售员的编号：");
+					arr[i][1] = scanner.nextInt();
+					System.out.println("请输入第" + j + "个商品数量");
+					arr[i][2] = scanner.nextInt();
+				}
+				
+					//arr[i][5] = (arr[i][j]/arr[i][6])*100;
+					//arr[i][6] = arr[i][1]+arr[i][2]+arr[i][3]+arr[i][4];
+				
+				
+			}
+			System.out.println("*********销售表***********");
+			System.out.println("销售员的销售商品数量/t商品的销售比/t销售总数");
+			for (int i = 0; i < arr.length; i++) {
+				for (int j = 0; j < arr[i].length; j++) {
+					System.out.print(arr[i][j]+"/t");
+				}
+				System.out.println();
+			}
+		}				
+	}					
+
+		
\ No newline at end of file