In Java, you can convert an int type variable to a String type variable using the String.valueOf() method or by concatenating the int value with an empty String. Here are examples of both methods:

Method 1: Using the String.valueOf() method

int num = 123;
String str = String.valueOf(num);

System.out.println("String value: " + str); // output: 123

In the above example, we define an int variable num with a value of 123. We then use the String.valueOf() method to convert num to a String variable str.

After the conversion, the value of str is "123", which we verify by printing it to the console using the System.out.println method.

Method 2: Concatenating the int value with an empty String

int num = 456;
String str = num + "";

System.out.println("String value: " + str); // output: 456

In the above example, we define an int variable num with a value of 456. We then concatenate num with an empty String to convert it to a String variable str.

After the conversion, the value of str is "456", which we verify by printing it to the console using the System.out.println method.

Note that the Integer.toString() method can also be used to convert an int variable to a String variable, like this:

int num = 789;
String str = Integer.toString(num);

System.out.println("String value: " + str); // output: 789