Java 10: Local variable type inference with var

var lets the compiler infer a local variable type from its initializer.

Code

var list = new ArrayList<String>();
list.add("hello");
var count = list.size();
var text = "count = " + count;
System.out.println(text + ", first = " + list.get(0));

Output

count = 1, first = hello

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Published 2026-07-26