第一种:foreach语句遍历输出 //通过foreach语句遍历输出数组 int nums[] = new int [4]; for (int num:nums) { System.out.print(num); } 这种方法等同于用for循环的输出方式,当然明显更简洁. 第二种: 通过for循环输出数组 //通过for循环输出数组 for (int i = 0; i < nums.length; i++) { System.out.print(nums[i]); } 相比foreach遍历输…
一. java中实现线程的方式有Thread和Runnable Thread: public class Thread1 extends Thread{ @Override public void run() { System.out.println("extend thread"); } } Runnable: public class ThreadRunable implements Runnable{ public void run() { System.out.println(…
2,3,4,6,8 betwenen 为闭区间,前后都包括 select * from(select a.*,rownum rn from (select * from student) a ) where rn between 1 and 3; desc 降序 java 用jdbc方式以 sys账号连接oracle数据的问题…