Top 100 Java Interview Questions for 1 to 3 Years Experienced Programmers

Hello there, my friends.

Are you a Java programmer with 1–3 years of experience? Congratulations, you have passed the beginner level and now it’s time to showcase your skills in interviews. To help you prepare for your next interview, we have compiled a list of the top 100 Java interview questions that you may encounter.
Questions cover Java Foundation, containers, multithreading, reflection, object copy, Java Web, exceptional cases, internet and Spring MVC.

（1）Interview questions about the Java Foundation.

1. What is the distinction between JDK and JRE?
2. What’s the distinction between == and equals?
3. Equals() must be true if two objects have the same hashCode(), right?
4. What is the function of final in Java?
5. In Java, what does Math.round(-1.5) mean?
6. Is String a fundamental data type?
7. In Java, what are the classes for manipulating strings? What is the distinction between them?
8. Is String str=“i” synonymous with String str=new String(“i”)?
9. What is the best way to invert a string?
10. What are the String class’s common methods?
11. Is it necessary to have abstract methods in abstract classes?
12. What is the distinction…