In this example, we will learn about iterate list using streams in java with example
It was introduced on Java 8
Features of Streams
- No Storage
- we can do arithmetic operations
- we can filter the data without removing.
Syntax
list.stream().forEach((x) -> {operations});
Example
import java.util.ArrayList;
import java.util.List;
public class IterateListUsingStreams {
public static void main(String[] args) {
List list = new ArrayList();
list.add("Apple");
list.add("Pineapple");
list.add("Papaya");
list.stream().forEach((x) -> System.out.println(x));
}
}Output
Example with Pojo
Student.java
public class Student {
private int id;
private String name;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
IterateListUsingStreams2 .java
import java.util.ArrayList;
import java.util.List;
public class IterateListUsingStreams2 {
public static void main(String[] args) {
List studentList = new ArrayList();
Student student = null;
student = new Student();
student.setId(1);
student.setName("Rajesh");
student.setAddress("Chennai");
studentList.add(student);
student = new Student();
student.setId(1);
student.setName("Kumar");
student.setAddress("Chennai");
studentList.add(student);
studentList.stream().forEach((x) -> System.out.println("Student Id is "+x.getId()+" Name is "+x.getName()));
}
}
Output
Student Id is 1 Name is Rajesh
Student Id is 1 Name is Kumar
References
https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html
GitHub
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ArrayList in java with example