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1 2 3 4 5 | Boolean boolean1 = true; String str3 = (String)boolean1;//这行代码会报错,编译不过 String str4 = boolean1.toString();//正常 String str5 = String.valueOf(boolean1);//正常 |
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1 2 | Object obj = getObject(); Syystem.out.println(obj.toString()); |
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1 | public static String valueOf(Object obj){return (obj==null) ? "null" : obj.toString()}; |
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