下面是一個用Java輸出等腰楊輝三角的示例代碼：

import java.util.Scanner;

public class YangHuiTriangle {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("請輸入楊輝三角的行數：");
        int numRows = scanner.nextInt();

        int[][] triangle = new int[numRows][];

        for (int i = 0; i < numRows; i++) {
            triangle[i] = new int[i + 1];
            triangle[i][0] = 1;
            triangle[i][i] = 1;

            for (int j = 1; j < i; j++) {
                triangle[i][j] = triangle[i - 1][j - 1] + triangle[i - 1][j];
            }
        }

        for (int i = 0; i < numRows; i++) {
            for (int j = 0; j < numRows - i - 1; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j <= i; j++) {
                System.out.print(triangle[i][j] + " ");
            }
            System.out.println();
        }
    }
}

運行這個代碼，輸入要輸出的楊輝三角的行數，程序會輸出相應行數的等腰楊輝三角形狀。