99 乘法表倒立
public class MultTable
{
public static void main(String args[])
{
for(int i=1;i<=9;i++)
{
for(int j=i;j<=9;j++)
{
System.out.print(i+"*"+j+"="+i*j+" ");
}
System.out.println();
}
}
}
猜数
import java.util.Scanner;
import java.util.Random;
public class CaiSu
{
public static void main(String []args)
{
Scanner sc= new Scanner(System.in);
Random rd1=new Random();
int rd= rd1.nextInt(10)+1;
String flag="y";
do{
System.out.println("请输入一个数");
int a=sc.nextInt();
if(rd==a)
{
System.out.println("你太聪明了。这样也能猜对。。");
}
if(rd>a)
{
System.out.println("你输入的数太小了");
}
if(rd<a)
{
System.out.println("你输入的数太大了");
}
System.out.println("是否还要继续");
flag=sc.next();
}while("y".equals(flag)||"Y".equals(flag));
}
}
插入排序
public class InjectionSort {
public static void injectionSort(int[] number){
for(int j = 1;j<number.length;j++){
int tmp = number[j];
int i = j-1;
while(tmp<number[i]){
number[i+1] = number[i];
i–;
if(i == -1)
break;
}
number[i+1] = tmp;
}
}
public static void main(String[] args){
int[] num = {5,46,26,67,2,35};
injectionSort(num);
for(int i = 0;i<num.length;i++)
{
System.out.println(num[i]);
}
}
}
