String concatenation: Difference between revisions
→{{header|Java}}
No edit summary |
|||
Line 1,122:
=={{header|Java}}==
There are multiple ways to concatenate string values in Java.<br />
The most common way is through the plus operator.
<syntaxhighlight lang="java">
String string = "abc" + "def";
</syntaxhighlight>
Which can also be written as
<syntaxhighlight lang="java">
String string = "abc";
string += "def";
</syntaxhighlight>
There is also the ''String.concat'' method
<syntaxhighlight lang="java">
String string = "abc".concat("def");
</syntaxhighlight>
You could use a ''StringBuilder'' object if you're appending multiple strings.
<syntaxhighlight lang="java">
StringBuilder string = new StringBuilder();
string.append("abc").append("def");
</syntaxhighlight>
''StringBuilder'' also conveniently lets you insert strings within strings.<br />
So, you can also concatenate a string as follows
<syntaxhighlight lang="java">
StringBuilder string = new StringBuilder();
string.append("abc");
string.insert(3, "def");
</syntaxhighlight>
A less common approach would be to use the ''String.format'' or ''String.formatted'' methods.
<syntaxhighlight lang="java">
String string = String.format("%s%s", "abc", "def");
</syntaxhighlight>
<syntaxhighlight lang="java">
String string = "%s%s".formatted("abc", "def");
</syntaxhighlight>
All of these methods will produce the following string
<pre>
abcdef
</pre>
<br />
Alternately
<syntaxhighlight lang="java5">public class Str{
public static void main(String[] args){
| |||