判斷題
- Java中 基本數(shù)據(jù)類型是引用傳遞 （false）===> java 不存在引用傳遞
填空題
-
閱讀下面代碼，填寫合適的結(jié)果（JDK 8）
選擇填空 rs1 = () rs2 = () rs3 = () rs4 = () A true B false [1-4]={B,A,A,B}
public class StringPoolDemo {
private static String str1 = "str1";
private String str2 = "str3";
public static void main(String[] args) {
String str3 = new String("str1");
str3.intern();
String str4 = "str1";
boolean rs1 = str3 == str4;
System.out.println("rs1 ====> "+rs1);
String str5 = new String("str1") + new String("str2");
str5.intern();
String str6 = "str1" + "str2";
boolean rs2 = str5 == str6;
System.out.println("rs2 ====> "+rs2);
StringPoolDemo constantTest = new StringPoolDemo();
String str7 = "str3";
boolean rs3 = constantTest.str2 == str7;
System.out.println("rs3 ====> "+rs3);
String str8 =new String("java");
str8.intern();
String str9 = "java";
boolean rs4 = str8==str9;
System.out.println("rs4 ====> "+rs4);
}
}
