JAVA28. 创建单例对象
描述
Singleton类是单例的，每次调用该类的getInstance()方法都将得到相同的实例，目前该类中这个方法尚未完成，请将其补充完整，使得main()函数中的判断返回真（不考虑线程安全）。输入描述
无输出描述
trueJava 解法, 执行用时: 7ms, 内存消耗: 9008KB, 提交时间: 2022-02-08
public class Main {
public static void main(String[] args) {
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
//write your code here......
public static Singleton getInstance() {
return instance;
}
}
Java 解法, 执行用时: 7ms, 内存消耗: 9064KB, 提交时间: 2022-02-10
public class Main {
public static void main(String[] args) {
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
//write your code here......
public static Singleton getInstance()
{
return instance;
}
}
Java 解法, 执行用时: 7ms, 内存消耗: 9104KB, 提交时间: 2021-10-14
public class Main {
public static void main(String[] args) {
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
//write your code here......
public static Singleton getInstance() {
return instance;
}
}
Java 解法, 执行用时: 7ms, 内存消耗: 9108KB, 提交时间: 2021-11-18
public class Main {
public static void main(String[] args) {
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
//write your code here......
public static Singleton getInstance(){
if(instance == null)
instance = new Singleton();
return instance;
}
}
Java 解法, 执行用时: 7ms, 内存消耗: 9152KB, 提交时间: 2021-10-13
public class Main {
public static void main(String[] args) {
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
public static Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
//write your code here......
}