diff --git "a/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/DEMO02.java" "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/DEMO02.java"
new file mode 100644
index 0000000000000000000000000000000000000000..1007357d87c6ddbdf2d12539efb3369d1f7499a3
--- /dev/null
+++ "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/DEMO02.java"
@@ -0,0 +1,32 @@
+
+public class DEMO02 {
+
+	public static void main(String[] args) {
+		int a [] = {70,10,20,30,40};
+		for (int i = 0; i < 2; i++) {
+			System.out.print(aa(a)[i]);
+			System.out.print(" ");
+		}
+		
+	}
+	
+	
+    public static int[] aa(int[] a ) {
+    	int abc[] = new int [2];
+    	int max=a[0];
+    	int min=a[0];
+    	for (int i = 0; i < a.length; i++) {
+			if (a[i]>max) {
+				max=a[i];
+			}
+			if (a[i]<min) {
+				min=a[i];
+			}
+		}
+     abc[0] = max;
+     abc[1] = min;
+     return abc;
+    }
+	}
+
+
diff --git "a/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo01.java" "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo01.java"
new file mode 100644
index 0000000000000000000000000000000000000000..dc2555c775bd1b6bf229a1d05cc0392988d395cc
--- /dev/null
+++ "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo01.java"
@@ -0,0 +1,19 @@
+
+public class Demo01 {
+
+	public static void main(String[] args) {
+		int a [] = {1,10,20,30,40};
+		max(a);
+	}
+	
+	
+    public static void max(int[] a ) {
+    	int max=a[0];
+    	for (int i = 0; i < a.length; i++) {
+			if (a[i]>max) {
+				max=a[i];
+			}
+		}
+    	System.out.println(max );
+    }
+}
diff --git "a/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo03.java" "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo03.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a1147718b4ab0d7a7b212d15016fd1db695bcf55
--- /dev/null
+++ "b/\346\226\271\346\263\225\347\273\203\344\271\240/\350\256\270\345\237\271\346\250\237/Demo03.java"
@@ -0,0 +1,17 @@
+
+public class Demo03 {
+
+	public static void main(String[] args) {
+		int a [] = {1,10,20,30,40};
+		shuzhu(a);
+	}
+    public static void shuzhu(int[] a) {
+    	int [] abc = {11,22,33,44,55};
+    	System.out.print("[");
+    	for (int i = 0; i < a.length; i++) {
+    		System.out.print(abc[i]);
+			System.out.print(" ");
+		}
+    	System.out.println("]");
+    }
+}