Why only +String concatation for Operator Overloading ?

Question

Java does not support operator overloading other than the + operator for addition of two Strings or a number and a String.Why only the + operator and Strings, even when we have a concat() for addition of Strings ?
Wondering if anyone could provide me some link as to why this only this (+) operator was chosen.
Thank you for your consideration.
Edited by: amtidumpti on Apr 27, 2009 6:40 AM
Edited by: amtidumpti on Apr 27, 2009 6:40 AM

Answer 1

amtidumpti wrote:
stevejluke wrote:
amtidumpti wrote:
Java does not support operator overloading other than the + operator for addition of two Strings or a number and a String.Why only the + operator and Strings, even when we have a concat() for addition of Strings ? I assume the + was implemented (even with the concat() method present) for simplicity with working with Strings. Why only +? What other operators make sense as String manipulation operators? Why are they useful?We already have String,StringBuilder,StringBuffer for simplicity and manipulations of Strings or may be they were added later,but even then we have this +.Right, and you can use those methods instead of +. But String is a much-used class, has several special attributes given to it, and the + is very self-explanatory when applied to Strings.
Also would == qualify as the other operator for operator overloading in java ?== has no special meaning for Strings (or really for Objects at all). It has exactly one purpose, to compare the value of the operands provided. When the operands are primitives, it compares their values exactly as you or I would (if the primitive values are equal you get true). When the operands are reference types the value of the references are tested for equality (if they don't hold a reference to the same Object, then == returns false).
>
int iAge1=0,iAge2=0;
String sName1="Java",sName2="Rocks";
double dMark1=89.02,dMark2=92.0;
if(iAge1==iAge2)
System.out.println("HURRAH");
if(sName1==sName2)
System.out.println("HURRAH");
if(dMark1==dMark2)
System.out.println("HURRAH");Also in case of boolean :
boolean bFlag1=false,bFlag2=true;
if(bFlag1=bFlag2)
System.out.println("Value Assignment done");Here is " = " working not only as a assignment operator as well as conditional operator ?
Thanks for your consideration.