返回列表 發帖

陣列的長度

本帖最後由 tonyh 於 2014-12-6 17:22 編輯

利用length屬性, 可取得陣列的長度, 即該陣列包含了幾位成員.
  1. public class ch40
  2. {
  3.     public static void main(String args[])
  4.     {
  5.         int a[]={1,2,3,4};
  6.         int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.         int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.         System.out.println(a.length);     //4
  9.         System.out.println(b.length);     //3
  10.         System.out.println(c.length);     //2
  11.     }
  12. }
複製代碼

  1. public class ch40
  2. {
  3.     public static void main(String args[])
  4.     {
  5.          int a[]={1,2,3,4};
  6.          int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.          int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.          System.out.println(a.length);
  9.          System.out.println(b.length);
  10.          System.out.println(c.length);
  11.     }
  12. }
複製代碼

TOP

  1. public class ch39
  2. {
  3.     public static void main(String args[])
  4.     {
  5.          int a[]={1,2,3,4};
  6.          int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.          int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.          System.out.println(a.length);
  9.          System.out.println(b.length);
  10.          System.out.println(c.length);   
  11.     }
  12. }
複製代碼

TOP

  1. public class ch40
  2. {
  3.         public static void main(String[] args)
  4.         {
  5.                 int a[]={1,2,3,4};
  6.                 int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.                 int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.                 System.out.println(a.length);
  9.                 System.out.println(b.length);
  10.                 System.out.println(c.length);
  11.         }
  12. }
複製代碼

TOP

  1. public class ch35
  2. {
  3.     public static void main(String args[])
  4.     {
  5.          int a[]={1,2,3,4};
  6.          int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.          int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.          System.out.println(a.length);
  9.          System.out.println(b.length);
  10.          System.out.println(c.length);
  11.     }
  12. }
複製代碼

TOP

  1. public class ch40
  2. {
  3.     public static void main(String args[])
  4.     {
  5.          int a[]={1,2,3,4};
  6.          int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.          int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.          System.out.println(a.length);
  9.          System.out.println(b.length);
  10.          System.out.println(c.length);
  11.     }
  12. }
複製代碼

TOP

  1. public class ch40
  2. {
  3.     int a[]={1,2,3,4};
  4.     int b[][]={{1,2,3,4},{1,2,3,4}};
  5.     int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}}
  6.     System.out.println(a.length);
  7.     System.out.println(b.length);
  8.     System.out.println(c.length);
  9. }
複製代碼

TOP

  1. public class ch40
  2. {
  3.     public static void main(String args[])
  4.     {
  5.         int a[]={1,2,3,4};
  6.         int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
  7.         int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
  8.         System.out.println(a.length);
  9.         System.out.println(b.length);
  10.         System.out.println(c.length);
  11.     }
  12. }
複製代碼

TOP

返回列表