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java-programming/javaUpdates/src/array/HashsetDemo.java at master · 9146887137/java-programming · GitHub
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javaUpdates
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src
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array
/
HashsetDemo.java
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31 lines (21 loc) · 483 Bytes
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java-programming
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javaUpdates
/
src
/
array
/
HashsetDemo.java
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package
array
;
import
java
.
util
.
ArrayList
;
import
java
.
util
.
Collection
;
import
java
.
util
.
TreeSet
;
public
class
HashsetDemo
extends
ArrayList
<
Integer
>{
private
TreeSet
<
Object
>
tr
;
public
HashsetDemo
() {
tr
=
new
TreeSet
<
Object
>();
}
public
boolean
addElement
(
Integer
i
) {
return
add
(
i
);
}
@
Override
public
boolean
add
(
Integer
e
) {
return
tr
.
add
(
e
);
}
@
Override
public
String
toString
() {
return
String
.
valueOf
(
tr
);
}
}
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