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Author: Yunh4o

D3lotteryticket.java

@@ -0,0 +1,53 @@
+import java.text.NumberFormat;
+import java.util.Scanner;
+
+public class D3lotteryticket {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		int count = 0;
+		
+		Scanner sc = new Scanner(System.in);
+		System.out.println("输入和： (0~27)");
+		int sum = sc.nextInt();
+		float Probability;
+		
+		//所有结果
+//		for(int i=0;i<10;i++) {
+//			for(int j=0;j<10;j++) {
+//				for(int k=0;k<10;k++) {				
+//						System.out.println(i+"\t"+j+"\t"+k);
+//						count ++;
+//					
+//				}				
+//			}			
+//		}
+		
+		//和值概率
+		for(int i=0;i<10;i++) {
+			for(int j=0;j<10;j++) {
+				for(int k=0;k<10;k++) {
+	
+					if(i + j + k == sum) {
+					//	System.out.println(i+"\t"+j+"\t"+k);
+						count ++;
+					}
+					
+				}				
+			}			
+		}	
+		NumberFormat numberFormat = NumberFormat.getPercentInstance();  
+        //设置百分数精确度2即保留两位小数  
+		numberFormat.setMinimumFractionDigits(2);  
+        Probability = (float)count/1000;  
+
+		System.out.println("count = "+count);
+        System.out.println("Probability = " + numberFormat.format(Probability));  
+        
+
+		
+
+		
+	}
+
+}

JIUjiu.java

@@ -0,0 +1,14 @@
+
+public class JIUjiu {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		
+		for(int i = 1; i <= 9; i++) {
+			for(int j = 1;j <= i; j++) {
+				System.out.print(j+"X"+i+"="+i*j+"\t");	
+			}
+			System.out.println();
+		}		
+	}
+}

Max2Max.java

@@ -0,0 +1,30 @@
+
+public class Max2Max {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		//
+		int max = 0;
+		int max2 = 0 ;
+
+		for(int i = 0;i < 20;i++) {
+			int x;
+			x = (int)Math.floor(Math.random()* (85-10+1) ) + 10;
+			System.out.println(x);
+
+			if(x>max) {
+				max2 = max ;
+				max = x;
+			}else {
+				if(x >= max2 ) {
+					max2 = x;
+				}
+			}
+			
+		}
+		System.out.println("max = " + max);
+		System.out.println("max2 = " + max2);
+		
+	}
+
+}

MaxMinMid.java

@@ -0,0 +1,41 @@
+import java.util.Scanner;
+
+public class MaxMinMid {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner numbers = new Scanner(System.in);
+		System.out.print("请输入第一个数：");
+		int a1 = numbers.nextInt();
+		System.out.print("请输入第二个数：");
+		int a2 = numbers.nextInt();
+		System.out.print("请输入第三个数：");
+		int a3 = numbers.nextInt();
+		
+		int max = a1;
+		int min = a1;
+		int mid ;		
+		int sum = a1 +a2 + a3;
+		//最大值
+		if(a2 > max) {
+			max = a2;
+		}
+		if(a3 > max) {
+			max = a3;
+		}
+		//最小值
+		if(a2 < a1) {
+			min = a2;
+		}
+		if(a3 < min) {
+			min = a3;
+		}
+		//中间值
+		mid = sum - max - min;		
+		System.out.println("max:"+max);
+		System.out.println("min:"+min);
+		System.out.println("mid:"+mid);
+
+	}
+
+}

Rhombus.java

@@ -0,0 +1,62 @@
+
+public class Rhombus {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		//正向实心
+		for(int i = 0 ; i <= 10 ; i++) {
+			for(int j = 0 ; j < 10 - i ; j++) {
+				System.out.print(" ");	
+			}
+			for(int j=0;j<2*i+1;j++) {
+				System.out.print("*");
+			}
+			System.out.println();
+	
+		}
+		//反向
+		for(int i = 9 ; i >= 0 ; i--) {
+			for(int j = 0 ; j < 10 - i ; j++) {
+				System.out.print(" ");	
+			}
+			for(int j=0;j<2*i+1;j++) {
+					System.out.print("*");	
+			}
+			System.out.println();
+		}
+		
+		//正向 空心
+		for(int i = 0 ; i <= 10 ; i++) {
+			for(int j = 0 ; j < 10 - i ; j++) {
+				System.out.print(" ");	
+			}
+			for(int j=0;j<2*i+1;j++) {
+				if(j == 0 || j == 2 * i ) {
+					System.out.print("*");
+					
+				}else {
+					System.out.print(" ");	
+				}	
+			}
+			System.out.println();
+	
+		}
+		//反向
+		for(int i = 9 ; i >= 0 ; i--) {
+			for(int j = 0 ; j < 10 - i ; j++) {
+				System.out.print(" ");	
+			}
+			for(int j=0;j<2*i+1;j++) {
+				if(j == 0 || j == 2 * i ) {
+					System.out.print("*");
+					
+				}else {
+					System.out.print(" ");	
+				}	
+			}
+			System.out.println();	
+		}
+
+	}
+
+}

Triangle.java

@@ -0,0 +1,27 @@
+
+public class Triangle {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		//¿ÕÐÄÈý½Ç
+		for(int i = 0 ; i <= 10 ; i++) {
+			for(int j = 0 ; j < 10 - i ; j++) {
+				System.out.print(" ");	
+			}
+			for(int j=0;j<2*i+1;j++) {
+				if(j == 0 || j == 2 * i || i == 10) {
+					System.out.print("*");
+					
+				}else {
+					System.out.print(" ");	
+				}	
+			}
+			System.out.println();
+	
+		}
+		
+		
+		
+		
+	}
+}