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// Classic declaration, we are repeating ourselves | |
Integer ten = new Integer(10); | |
// New declaration, using 'var' | |
var ten = new Integer(10); |
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class SomeClass { | |
// Kotlin allows this, as you can specify the intended type here | |
var property: String | |
} |
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// Can't use the local variable type inference with fields | |
public class SomeClass { | |
// Not allowed, var is only available for local variables | |
var property = ""; | |
} | |
// Can't leave values unitialzed | |
var uninitialized; // No way to infer the type | |
// Can't just assign null to var to reassign later (but workaround available) |
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// Classic declaration | |
ArrayList<Integer> list = new ArrayList<Integer>(); | |
// But honestly, since Java 7 Java we can use the diamond operator <> (or omit it entirely) | |
ArrayList<Integer> list = new ArrayList(); | |
// Var declaration | |
var list = new ArrayList<Integer>(); |
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