public class test1{
public static void main(String[] args){
char[] num = {‘A’,’B’,’C’,’D’,’E’,’F’,’G’};

 for(int i=1;i<=num.length;i++){
    //列印空格
    for(int j=i;j<num.length;i++){
        System.out.print(" ");
    }
    //列印三角形
    for(int j=1;j<=i*2-1;j++){
        System.out
 
.print(num[i-1]);
    }
    System.out.println();
}

}

}