Answer / Rahul Vaish

To join strings in Java, you can use the + operator or concatenation method (String.join()). Using the + operator: `String str1 = "Hello"; String str2 = "World"; String result = str1 + ' ' + str2;`. Using String.join(): `List<String> list = Arrays.asList("Hello", "World"); String result = String.join(" ", list);`

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