public void drawDiamond(int num){
        char[][] b = new char[num][num];
        if(oddNumber(num)){
            for(int i = 0;i <= num-1;i++){
                for(int j = 0;j <= num-1;j++){
                    if((i + j == num/2 )||(i + j == num + 1)||(i - j == num/2)||(j - i == num/2) ){
                        b[i][j] = '*';
                    }else{
                        b[i][j] = ' ';
                    }
                }
            }
        }else{
            for(int i = 0;i <= num-1;i++){
                for(int j = 0;j <= num-2;j++){
                    if((i + j == num/2-1)||(j - i == num/2-1)||(i - j == num/2)||(i + j == num-2+num/2)){
                        b[i][j] = '*';
                    }else{
                        b[i][j] = ' ';
                    }
                }
        }
        for(int i = 0;i <= num-1;i++){
            for(int j = 0;j <= num-1; j++){
                System.out.print(b[i][j]);
            }
            System.out.println();
        }在这里编译器报错，（语法错误，将“}”插入到完整 Block 中）
    }