java输出正三角形

public static void showSanJao(int m){ 
        for(int i=1;i<=m;i++){ 
            for(int j=1;j<=m-i+1;j++){ 
                System.out.print(" "); 
            } 
            for(int z=1;z<=2*i-1;z++){ 
                System.out.print("*"); 
            } 
            System.out.println(); 
        } 
    }  [/size][size=x-large][align=center][/align]