diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo2.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..54f5825276eaf3f2ddfe9716133f692fe58cdcc6
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo2.java"
@@ -0,0 +1,15 @@
+
+public class Demo2 {
+//遍历数组
+	public static void main(String[] args) {
+		int a [][]= {{1,2,3},{4,5,6},{7,8,9}};
+		for(int i=0;i<a.length;i++) {
+			for(int y=0;y<a[i].length;y++) {
+				System.out.print(a[i][y]);
+				System.out.print("|");
+			}
+		}
+
+	}
+
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo3.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..77b9c89ad3033d791689430ff3ebbb3d9130cc36
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo3.java"
@@ -0,0 +1,42 @@
+import java.util.Scanner;
+
+public class Demo3 {
+//员工考勤
+	public static void main(String[] args) {
+		Scanner scanner = new Scanner(System.in);
+		int a [][]=new int [5][6];
+		String b []= {"员工编号","忘打卡","迟到","早退","矿工","总罚款（单位元）"};
+		
+		for(int x=0;x<a.length;x++) {
+			for(int y=0;y<5;y++){
+				System.out.println("请输入第"+(x+1)+"个员工的"+b[y]);
+				a[x][y]=scanner.nextInt();
+			}
+		}
+		int sum;
+		for(int p=0;p<a.length;p++) {
+			
+			sum=(a[p][1]*10)+(a[p][2]*20)+(a[p][3]*20)+(a[p][4]*100);
+			a[p][5]=sum;
+		}
+		
+		System.out.println("**********************本月考勤信息***********************");
+		for(int z=0;z<b.length;z++) {
+			System.out.print(b[z]);
+			System.out.print("  ");
+			
+		}
+		System.out.println();
+		for(int n=0;n<a.length;n++) {
+			for(int m=0;m<a[n].length;m++) {
+				System.out.print(a[n][m]);
+				System.out.print("     ");
+			}
+			System.out.println();
+		}
+		
+		
+	}
+	
+
+}
diff --git "a/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo4.java" "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..bd19b77f69d67fea0598a6dad42f4475ec8a30f9
--- /dev/null
+++ "b/\344\272\214\347\273\264\346\225\260\347\273\204/\351\237\246\345\244\251\347\277\224/Demo4.java"
@@ -0,0 +1,23 @@
+
+public class Demo4 {
+//业绩总和
+	public static void main(String[] args) {
+	int a [][]= {{11,22,33},{44,55,66},{77,88,99},{12,34,56}};
+	int sum=0;
+	for(int x=0;x<a.length;x++) {
+		for(int y=0;y<a[x].length;y++) {
+			sum=sum+a[x][y];
+		}
+	}
+	for(int x=0;x<a.length;x++) {
+		System.out.println();
+		for(int y=0;y<a[x].length;y++) {
+			System.out.print(a[x][y]);
+			System.out.print("  ");
+		}
+	}
+	System.out.println();
+	System.out.println("总和为"+sum);
+	}
+
+}