String鐨勭壒孌婁箣澶勫氨鏄畠鍙互鍍廼nt絳夌畝鍗曠被鍨嬩竴鏍鳳紝浣跨敤鈥?鈥濇潵鐢熸垚涓涓狾bject錛岃屼笉蹇呯敤new榪欎釜鍏抽敭瀛楋紝涓轟粈涔堝憿錛熷厛鏉ョ湅涓嬮潰鐨勪唬鐮侊細
import junit.framework.TestCase;
public class TestStringPool extends TestCase 
{
private String string1; private String string2;
protected void setUp() { string1 = "abc"; string2 = "abc";
} public void testStringPool() { assertTrue(string1 == string2); } public void testNewString() { string1 = new String("abc"); string2 = new String("abc"); assertFalse("The objects don't use the string pool", string1 == string2); }
}榪欓噷鐢ㄥ埌浜?/SPAN>JUnit錛岀敤鏉ユ祴璇?/SPAN>String pool銆?/SPAN>
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緇撹錛氭垜浠瘮杈冧袱涓猄tring鐨勫鹼紝鏈濂界敤equals()鏂規硶錛岃屾渶濂戒笉瑕佷嬌鐢?=銆傝繖灝遍伩鍏嶄簡涓浜涗笉蹇呰鐨勯夯鐑︺傚彟澶栵紝澹版槑String鐨勬椂鍊欙紝鏈濂界敤=錛岃繖鏍峰氨鍙互浣撶幇String pool鐨勪綔鐢ㄤ簡銆?/FONT>
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123.456.0.1 abcde
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鍏堟潵鐪嬩竴孌典唬鐮侊細
public static void main(String[] args) {
Date date = new Date();
Object object = new Object();
Timestamp stamp = new Timestamp(date.getTime());
System.out.println("date&stamp:" + date.compareTo(stamp));
System.out.println("stamp&date:" + stamp.compareTo(date));
System.out.println("date&object:" + date.compareTo(object));
}
}
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