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import static org.junit.Assert.assertNotSame;   
import static org.junit.Assert.assertSame;   
  
import org.junit.Test;   
  
/**  
 * @author Heis  
 *  
 */  
public class StringTest{   
  
    @Test  
    public void testTheSameReference1(){   
        String str1="abc";   
        String str2="abc";   
        String str3="ab"+"c";   
        String str4=new String(str2);   
           
        //str1ºÍstr2ÒýÓÃ×Ô³£Á¿³ØÀïµÄͬһ¸östring¶ÔÏó   
        assertSame(str1,str2);   
        //str3ͨ¹ý±àÒëÓÅ»¯£¬Óëstr1ÒýÓÃ×Ôͬһ¸ö¶ÔÏó   
        assertSame(str1,str3);   
        //str4ÒòΪÊÇÔÚ¶ÑÖÐÖØÐ·ÖÅäµÄÁíÒ»¸ö¶ÔÏó£¬ËùÒÔËüµÄÒýÓÃÓëstr1²»Í¬   
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*/
public class T {

public static void main(String[] args) {
Integer i1 = 128;
Integer i2 = 128;
int i3 = 128;
int i4 = 128;
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