import?java.io.InputStreamReader;
public?class?JuZhen?{
public?static?String?format(int?source,int?len){
String?sourceString?=?source+"";
if?(sourceString.length()?>=?len)?{
return?sourceString;
}else?{
String?space?=?"";
for?(int?i?=?0;?i?<?(len=sourceString.length());?i++)?{
space+="?";
}
return?space+sourceString;
}
}
public?static?void?main(String[]?args)?throws?Exception{
System.out.println("請輸入要輸出的矩陣長度");
BufferedReader?br?=?new?BufferedReader(new?InputStreamReader(System.in));
String?numString?=?br.readLine();
br.close();
int?num?=?0;
try?{
num?=?Integer.parseInt(numString);
}?catch?(Exception?e)?{
System.out.println("輸入內容非數字");
}
if?(num?<=?0)?{
System.out.println("輸入數字需為正整數");
}
int?len?=?Integer.toString(num*num).length();
for?(int?i?=?1;?i?<=?num;?i++)?{
for?(int?j?=?0;?j?<?num;?j++)?{
int?source?=?i+(j*num);
String?print?=?format(source,?len);
if?(j==0)?{System.out.print(print);
}else?{
System.out.print(""+print);
}
}
System.out.println();
}
}
} 輸出如下：
請輸入要輸出的矩陣長度
5
1 6 ? 11 ? 16 ? 21 2 7 ? 12 ? 17 ? 22 3 8 ? 13 ? 18 ? 23 4 9 ? 14 ? 19 ? 24 5 ? 10 ? 15 ? 20 ? 25