How to quickly master the key points of Java function development
As a Java developer, it is very important to master the key points of Java function development. With the widespread application and continuous development of Java, mastering the core points of Java function development will help you complete project development quickly and efficiently. This article will introduce you to some key points and provide code examples to help you understand better.
public class SumCalculator { public static void main(String[] args) { int num1 = 10; int num2 = 20; int sum = num1 + num2; System.out.println("两个数的和为:" + sum); } }
public class Person { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } public void sayHello() { System.out.println("Hello, my name is " + this.name + ". I'm " + this.age + " years old."); } public static void main(String[] args) { Person person = new Person("John", 25); person.sayHello(); } }
import java.util.ArrayList; import java.util.List; public class ListExample { public static void main(String[] args) { List<String> fruits = new ArrayList<>(); fruits.add("apple"); fruits.add("banana"); fruits.add("orange"); System.out.println("水果列表:"); for (String fruit : fruits) { System.out.println(fruit); } } }
public class DebugExample { public static void main(String[] args) { int n = 5; for (int i = 0; i < n; i++) { System.out.println("i = " + i); } } }
Set breakpoints in the IDE to step through the code and observe the values of variables to help locate problems.
By mastering the basic knowledge of Java, becoming familiar with Java development tools and environments, understanding object-oriented programming ideas, learning common Java class libraries and frameworks, mastering debugging skills and other key points, you can quickly master the development of Java functions. key points and improve development efficiency. Hope this article is helpful to you!
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