public class YH {

    public  void yangHuiTriangle(int s){

       /* System.out.println("请输入行数：");

        Scanner sc = new Scanner(System.in);

        s=sc.nextInt();*/

       //创建二维数组

        int triangle[][] = new int[];

        //遍历二维数组的第一层

        for(int i=0;i<triangle.length;i++){

            //初始化第二层数组的大小

            triangle = new int[i+1];

            //打印正三角n行要满足每一行比上一行少一个*

            int num=triangle.length-i;

            for(int z=0;z<num;z++){

                System.out.print("*");

            }

            //遍历第二层数组

            for(int j=0;j<triangle.length;j++){

                //两层的数组元素复制为1

                if (i==0||j==0||j==triangle.length-1){

                    triangle[j] = 1;

                }else{

                    //其他数值通过公式计算

                    triangle[j] = triangle[i-1][j]+triangle[i-1][j-1];

                }

                System.out.print(triangle[j]+" ");

            }

            System.out.println();

        }

    }

    public static void main(String[] args) {

        YH yh = new YH();

        yh.yangHuiTriangle(10);

    }

}

运行结果如下：

/usr/dev/java/jdk1.8.0_131/bin/java -javaagent:/usr/dev/idea2018/idea-IU-181.5281.24/lib/idea_rt.jar=40129:/usr/dev/idea2018/idea-IU-181.5281.24/bin -Dfile.encoding=UTF-8 -classpath /usr/dev/java/jdk1.8.0_131/jre/lib/charsets.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/deploy.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/cldrdata.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/dnsns.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/jaccess.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/jfxrt.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/localedata.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/nashorn.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/sunec.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/sunjce_provider.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/sunpkcs11.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/ext/zipfs.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/javaws.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/jce.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/jfr.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/jfxswt.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/jsse.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/management-agent.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/plugin.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/resources.jar:/usr/dev/java/jdk1.8.0_131/jre/lib/rt.jar:/home/leyou04/IdeaProjects/testClass/out/production/testClass com.YH

**********1

*********1 1

********1 2 1

*******1 3 3 1

******1 4 6 4 1

*****1 5 10 10 5 1

****1 6 15 20 15 6 1

***1 7 21 35 35 21 7 1

**1 8 28 56 70 56 28 8 1

*1 9 36 84 126 126 84 36 9 1

Process finished with exit code 0

奈斯