Use a generic toString() : toString « Class « Java

Use a generic toString()


import java.lang.reflect.Field;

public class Main {
  public static void main(String args[]) {
    System.out.println(new MyClass().toString());


class MyClass {
  String hello = "hi";

  int i = 0;

  public String toString() {
    StringBuilder sb = new StringBuilder();
    Class cls = getClass();
    Field[] f = cls.getDeclaredFields();

    for (int i = 0; i < f.length; i++) {
      try {
        sb.append(f[i].getName()+"="+ f[i].get(this)+"\n");
      } catch (Exception e) {
    if (cls.getSuperclass().getSuperclass() != null) {
      sb.append("super:"+ super.toString()+"\n");
    return cls.getName()+"\n" + sb.toString();


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3.Demonstrate toString() without an overrideDemonstrate toString() without an override
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7.Null Safe To String
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10.Gets the toString of an Object returning an empty string ("") if null input.
11.Gets the toString that would be produced by Object if a class did not override toString itself.