Standard.java

package io.singh1114.springboottut.standard;

public class Standard {
    private String standard;
    private String section;
    private String classTeacher;

    public Standard(String standard, String section, String classTeacher) {
        super();
        this.standard = standard;
        this.section = section;
        this.classTeacher = classTeacher;
    }

    public String getStandard() {
        return standard;
    }

    public void setStandard(String standard) {
        this.standard = standard;
    }

    public String getSection() {
        return section;
    }

    public void setSection(String section) {
        this.section = section;
    }

    public String getClassTeacher() {
        return classTeacher;
    }

    public void setClassTeacher(String classTeacher) {
        this.classTeacher = classTeacher;
    }
}

StandardController.java

package io.singh1114.springboottut.standard;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Arrays;
import java.util.List;

@RestController
public class StandardController {
    @RequestMapping("/standards")
    public List<Standard> getAllStandards() {
        return Arrays.asList(
                new Standard("1", "A", "Mr. Tom"),
                new Standard("2", "A", "Mr. Charlie"),
                new Standard("3", "A", "Mr. Potter"),
                new Standard("3", "B", "Mr. Read")
        );
    }
}