JAVA输出表格

public class Table {
	private static StringBuffer contentSb = new StringBuffer();
	//调整每列的宽度
	private static Integer[] widths = new Integer[] {10,30,50};
    static void print_table(String name, String course, String score) {
        String[] table = {name, course, score};
        for (int i = 0; i < 3; ++i) {
        	int size = widths[i];
            contentSb.append("|");
            int len = table[i].length();
//	            int left_space =   ①    ;
            int left_space =  (size-len)%2==0 ?(size-len)/2 :(size-len)/2+1 ;
//	            int right_space =    ②    ;
            int right_space =    (size-len)/2    ;
//	            for (int j = 0; j <   ③   ; ++j) {
            //左边空格
            for (int j = 0; j <   left_space   ; ++j) {
                contentSb.append(" ");
            }
            contentSb.append(table[i]);
            //右边空格
//	            for (int j = 0; j <   ④     ; ++j) {
            for (int j = 0; j <   right_space     ; ++j) {
                contentSb.append(" ");
            }
        }
        contentSb.append("|\n");
        for (int i = 0; i < 3; ++i) {
            contentSb.append("+");
            for (int j = 0; j < widths[i]; ++j) {
                contentSb.append("-");
            }
        }
        contentSb.append("+\n");
    }
    public static void main(String[] args) {
        //第一行输出
        for (int i = 0; i < 3; ++i) {
            contentSb.append("+");
            for (int j = 0; j < widths[i]; ++j) {
                contentSb.append("-");
            }
        }
        contentSb.append("+\n");
        print_table("name", "course", "score");
        print_table("barty", "math", "100");
        print_table("islands", "English", "60");
        print_table("wudi", "Chinese", "99");
        print_table("islands", "Physics", "100");
        System.out.println(contentSb.toString());
    }
}