int a=5; int b=10; a=a+b; b=a-b; a=a-b; System.out.println(a);//10 System.out.println(b);//5 String s1="java1"; String s2="java2"; s1=s1+s2; s2=s1.substring(0,(s1.length()-s2.length())); s1=s1.substring(s2.length()); System.out.println(s1);//java2 System.out.println(s2);//java1
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JAVA
int a=5;
int b=10;
a=a+b;
b=a-b;
a=a-b;
System.out.println(a);//10
System.out.println(b);//5
String s1="java1";
String s2="java2";
s1=s1+s2;
s2=s1.substring(0,(s1.length()-s2.length()));
s1=s1.substring(s2.length());
System.out.println(s1);//java2
System.out.println(s2);//java1