java中的数组

java中使用关键字new创建数组对象，格式为：数组名=new 数组元素的类型[数组元素的个数]

public class Test { 
    public static void main(String[] args) { 
        int[] s; 
        s = new int[5]; 
        for (int i = 0; i < 5; i++) { 
            s[i] = i; 
            System.out.println(s[i]); 
        } 
    } 
} 

public class Test {
 public static void main(String[] args) {
  int[] s;
  s = new int[5];
  for (int i = 0; i < 5; i++) {
   s[i] = i;
   System.out.println(s[i]);
  }
 }
}

二：元素为引用数据类型的数组中的每一个元素都需要实例化。

 public class Test2 { 
    public static void main(String[] args) { 
        Date[] days; 
        days = new Date[3]; 
        for (int i = 0; i < 3; i++) { 
            days[i] = new Date(2004, 4, i + 1); 
            System.out.println(days[i].toString()); 
        } 
    } 
} 
class Date { 
    int year, month, day; 
 
    Date(int y, int m, int d) { 
        year = y; 
        month = m; 
        day = d; 
    } 
 
    public String toString() { 
        return this.year + "," + this.month + "," + this.day; 
 
    } 
} 

public class Test2 {
 public static void main(String[] args) {
  Date[] days;
  days = new Date[3];
  for (int i = 0; i < 3; i++) {
   days[i] = new Date(2004, 4, i + 1);
   System.out.println(days[i].toString());
  }
 }
}
class Date {
 int year, month, day;

 Date(int y, int m, int d) {
  year = y;
  month = m;
  day = d;
 }

 public String toString() {
  return this.year + "," + this.month + "," + this.day;

 }
}