首先看官方文档上的解释: Managing External Tables Oracle Database allows you read-only access to data in external tables. External tables are definedas tables that do not reside in the database, and can be in any format forwhich an access driver is provided. By…
20170105问题解析请点击今日问题下方的"[Java每日一题]20170106"查看(问题解析在公众号首发,公众号ID:weknow619) package Jan2017; public class Ques0106 { public void method01(String... strings, int num){ } public void method02(String... strings, int... is){ } } 今日问题: 以上两个方法使用了变长参数,请问这…
20170104问题解析请点击今日问题下方的"[Java每日一题]20170105"查看(问题解析在公众号首发,公众号ID:weknow619) package Jan2017; import java.util.ArrayList; import java.util.List; public class Ques0105 { public static void main(String[] args) { List<String> list = new ArrayList…
20161230问题解析请点击今日问题下方的"[Java每日一题]20170103"查看(问题解析在公众号首发,公众号ID:weknow619) package Jan2017; public class Ques0103 { public static void main(String[] args){ System.out.println(delete("你好", "你").equals("好")); System.out…
package Dec2016; import java.util.ArrayList; import java.util.List; public class Ques1229 { public static void main(String[] args){ Student stu01 = new Student("001"); Student stu02 = new Student(null); List<Student> students = new ArrayLi…
package Dec2016; public class Ques1227 { public static void main(String[] args){ } { c = 1; } int c = 2; int a = b; int b = 3; } 今日问题: 请问主程序输出结果是什么?(点击以下"[Java每日一题]20161227"查看20161226问题解析) 题目原发布于公众号.简书:[Java每日一题]20161227,[Java每日一题]20161227 注:wek…
package Dec2016; public class Ques1226 { static{ num = 1; } public static int num = 2; public static void main(String[] args) { System.out.println(num); } } 今日问题: 请问主程序输出结果是什么?(点击以下"[Java每日一题]20161226"查看20161223问题解析) 题目原发布于公众号.简书:[Java每日一题]20161…
package Dec2016; public class Ques1223 { public static void main(String[] args){ Integer obj = Integer.valueOf(args[args.length - 1]); int i = obj.intValue(); if (args.length > 1) { System.out.println(i); } if (args.length > 0) { System.out.println(…
package Dec2016; import java.util.Random; public class Ques1222 { public static void main(String[] args){ System.out.println("输出常量:"+Test.NUM); } } interface Test{ public static final float NUM = new Random().nextFloat(); } 今日问题: 请问主程序输出的值是不变的吗?…
package Dec2016; public class Ques1221 { } class Parent{ public void test(){ System.out.println("Parent test"); } } class Sub extends Parent{ public String test(){ System.out.println("Sub test"); } } 今日问题: 请问主程序是否有编译错误?(点击以下"[Java…
package Dec2016; import java.util.Arrays; public class Ques1219 { public static void main(String[] args) { int num = 2; Dog[] dogs01 = new Dog[num]; // dogs01中有两只狗 for(int i = 0; i < num; i++){ dogs01[i] = new Dog(i, Color.values()[i]); } Dog[] dogs0…
package Dec2016; public class Ques1215 { static final int num1 = 2; static final int num2 = 3; static int num3 = 2; static int num4 = 3; public static void main(String[] args){ int result1 = num1 * num2; // 1 int result2 = num3 * num4; // 2 } } 今日问题:…
package Dec2016; import java.util.ArrayList; import java.util.List; public class Ques1214 { public static void main(String[] args){ final List<String> tickets = new ArrayList<String>(); for(int i = 0; i < 1000; i++){ tickets.add("高铁票-&…
package Dec2016; public class Ques1209 { public static void main(String[] args){ People g = new People("张三"); // 定义监护人 People p1 = new People("儿子1", g); People p2 = p1.clone(); // 儿子2的信息通过拷贝儿子1来的 p2.setName("儿子2"); p1.getGuar…
