java用类写杨辉三角问题并直角输出

题目如上
class YanghuiTri{
private int data[][];
private final int N = 10;
public YanghuiTri(){ this(N); }
public YanghuiTri(int row){
data=new int[row][];
for(int i=0;i<row;++i)
data[i]=new int[i+1];
full();
//TODO
}
public void full(){
int i,j;
for(i=0;i<data.length;++i)
data[i][0] = data[i][i] =1;
for(i=2;i<data.length;++i)
for(j=1;j<i;j++)
data[i][j] = data[i-1][j-1]+data[i-1][j];
//TODO
}
public void show(){
int i,j;
for(i=0;i<data.length;++i){
for(j=0;j<=i;++j)
System.out.print(data[i][j]+"");
System.out.println();
}
//TODO
}
public static void main(String args[]){
YanghuiTri oa = new (10);
Scanner oa=new Scanner(System.in);
oa.full();
oa.show();

}

}
以上为代码，有问题但不知道怎么改

先不看你的算法，单纯的从java的语法及你写的测试方法出发：

1. 此时类还没被实例化，是无法取到N的

    public YanghuiTri() {
        this(N);
    }
   

2. public static void main(String args[]){
   // 只写了引用，却没有写对象
   // 正确的为YanghuiTri oa = new YanghuiTri(10);
   YanghuiTri oa = new (10);
   // 和上面的变量同名了，并且没有用到，直接删除
   Scanner oa=new Scanner(System.in);
   // full()已经在你的构造函数中调用过了，直接删除
   oa.full();
   oa.show();
   }
   

public class TriangleArray {
    public static void main(String[] args) {
        final int NMAX = 10;
        // allocate triangular array
        int[][] odds = new int[NMAX + 1][];
        for (int n = 0; n <= NMAX; n++)
            odds[n] = new int[n + 1];
        // fill triangular array
        for (int n = 0; n < odds.length; n++)
            for (int k = 0; k < odds[n].length; k++) {
                /*
                 * compute binomial coefficient n*(n-1)*(n-2)*...*(n-k+1)/(1*2*3*...*k)
                 */
                int lotteryOdds = 1;
                for (int i = 1; i <= k; i++)
                    lotteryOdds = lotteryOdds * (n - i + 1) / i;

                odds[n][k] = lotteryOdds;
            }
        
        for (int[] row : odds)
        {
            for (int odd : row)
                System.out.printf("%4d", odd);
            System.out.println();
        }
    }
}

如需学习其他算法请参考我的博客:https://blog.csdn.net/zhanglide0526/article/details/120754067?spm=1001.2014.3001.5502