Question

Option 1
++++++++++
String s1;
String s2;
String s3;

.

Option 2
++++++++++
String s1,s2,s3;

I want to know what the actual difference between top two ways of declaring strings.? Any memory or execution speed changes may there.? or both are same .?

Answer 1

i check myself like below.

public class Declare1 {
    String s1, s2, s3;
}

public class Declare2 { 
    String s1;
    String s2;
    String s3;
}

compile each java file and open with text editer each Declare1.class,m Declare2.class..
the.. except unrecognized char.. exactly same.

Declare1
java/lang/Object s1 Ljava/lang/String; s2 s3 <init> ()V Code
LineNumberTable LocalVariableTable this 
LDeclare1; 
SourceFile 
Declare1.java

Declare2
java/lang/Object s1 Ljava/lang/String; s2 s3 <init> ()V Code
LineNumberTable LocalVariableTable this 
LDeclare2; 
SourceFile 
Declare2.java

after all. compile make a exactly same class file. so each performance will be same.