public class ChangeStrDemo public static void changeStr(String str)str=welcome
public class ChangeStrDemo public static void changeStr(String str)str=welcome
public class ChangeStrDemo { public static void changeStr(String str){ str="welcome"; } public static void main(String[] args) { String str="home"; changeStr(str); System.out.println(str); } }给出程序的运行结果（ ）
public class ChangeStrDemo { public static void changeStr(String str){ str="welcome"; } public static void main(String[] args) { String str="home"; changeStr(str); System.out.println(str); } }给出程序的运行结果（ ）
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