public class TestString {
public Test test1;
@Override
public String toString() {
StringBuilder sub = new StringBuilder();
sub.append(test1);
sub.append("care ful with NPE");
return test1 +"care ful with NPE";
}
public static void main(String[] args) {
final TestString testToString = new TestString();
System.out.println(testToString);
}
}
public class Test {
private final String fieldName;
public Test() {
fieldName = "";
}
public Test(String fieldName) {
this.fieldName = fieldName;
}
public String toString() {
StringBuilder sub = new StringBuilder();
sub.append("xxxasd");
return "xxxasd";
}
public int hashCode() {
return fieldName.hashCode();
}
}
how to get the value of test1 toString().here why i get null value here? I use string buffer to append the string but I can return the value as string.