error in the method of TreeSet

Question

I am using jdk7 and eclipse juno.I am learning TreeSet.while i am making a basic program of TreeSet it gives me error.I crosschecked with my booklet but i didnot found any change ,but my program is giving me error. This is my program

import java.util.TreeSet;


public class F 
{
 TreeSet<String> set=new TreeSet<String>();
set.add("hello");
set.add("abc");
set.add("test");
set.add("done")
System.out.println(set);

}

it gives me this error

D:\WORK\Set\src>javac F.java
F.java:8: error: <identifier> expected
set.add("hello");
       ^
F.java:8: error: illegal start of type
set.add("hello");
        ^
F.java:9: error: <identifier> expected
set.add("abc");
       ^
F.java:9: error: illegal start of type
set.add("abc");
        ^
F.java:10: error: <identifier> expected
set.add("test");
       ^
F.java:10: error: illegal start of type
set.add("test");
        ^
F.java:11: error: <identifier> expected
set.add("done");
       ^
F.java:11: error: illegal start of type
set.add("done");
        ^
F.java:12: error: <identifier> expected
System.out.println(set);

but during class this same program ran.!!!help me!!!

Move all those code inside the main method. You can't have statements directly inside the class. — Rohit Jain, Aug 27 '13 at 20:20

score 5 · Answer 1 · answered Aug 27 '13 at 20:19

5

Following statements Should be inside a method, not directly inside class.

set.add("hello");
set.add("abc");
set.add("test");
set.add("done")
System.out.println(set)

As @Dennis Meng commented, you are missing ; for last add statement.

answered Aug 27 '13 at 20:19

kosa

65,990
13
130
167

1

And he's missing a `;` on the last add. – Dennis Meng Aug 27 '13 at 20:20

score 1 · Answer 2 · answered Aug 27 '13 at 20:20

1

Missing semi-colon:

set.add("done")

...

set.add("done");

You also need to wrap the code in a method so it isn't directly inside of a class.

answered Aug 27 '13 at 20:20

Tricky12

6,752
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27
35

score 1 · Answer 3 · edited Aug 27 '13 at 20:26

You can not place your code inside the class itself. They should be inside a method or your main method, e.g.:

import java.util.TreeSet;

public class F {

    public static void main(String[] args) {
        TreeSet<String> set=new TreeSet<String>();
        set.add("hello");
        set.add("abc");
        set.add("test");
        set.add("done");
        System.out.println(set);
    }
}

error in the method of TreeSet

3 Answers3