Test Suite

package com.jianwang.num;

import org.junit.runner.RunWith;
import org.junit.runners.Suite;

@RunWith(Suite.class)

@Suite.SuiteClasses({
    CaculatorTest.class,
    CaculatorTest2.class}
)

public class AllTests
{
}

or

Make CaculatorTest(2) class extends TestCase, and then use Eclipse Wizard to generate test suite automatically as follows,

package com.jianwang.num;

import junit.framework.Test;
import junit.framework.TestSuite;

public class AllTests2
{
    public static Test suite()
    {
        TestSuite suite = new TestSuite("Test for com.jianwang.num");
        //$JUnit-BEGIN$
        suite.addTestSuite(CaculatorTest2.class);
        suite.addTestSuite(CaculatorTest.class);
        //$JUnit-END$
        return suite;
    }
}