java concatenate strings

1// String concatenation in java using concat() method
2public class StringConcatMethodDemo
3{
4   public static void main(String[] args)
5   {
6      String str1 = "Flower ";
7      String str2 = "Brackets";
8      String str3 = str1.concat(str2);
9      System.out.println(str3);
10   }
11}

1// StringBuilder
2String stringBuilderConcat = new StringBuilder()
3    .append(greeting)
4    .append(" ")
5    .append(person)
6    .append("! Welcome to the ")
7    .append(location)
8    .append("!")
9    .build();

1public class ConcatenationExample {
2   public static void main(String args[]) {
3       //One way of doing concatenation
4       String str1 = "Welcome";
5       str1 = str1.concat(" to ");
6       str1 = str1.concat(" String handling ");
7       System.out.println(str1);
8
9       //Other way of doing concatenation in one line
10       String str2 = "This";
11       str2 = str2.concat(" is").concat(" just a").concat(" String");
12       System.out.println(str2);
13   }
14}

1public class Concat {
2    String cat(String a, String b) {
3        a += b;
4        return a;
5    }
6}

1String s="Sachin"+" Tendulkar";  
2   System.out.println(s);//Sachin Tendulkar  
3
4Output:Sachin Tendulkar
5

1-By  using (+) operator
2-By  using concatenate method (concat()).
3                      String strconcat3=strconcat2.concat(strconcat);
4
5-By StringBuffer
6-String strconcat= new StringBuilder().append("matt")
7                                .append("damon").toString();
8                                
9-By StringBuilder
10- String strconcat2= new StringBuffer()
11                  .append("matt").append("damon").toString();