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This article is to share with you about how to create an object in String. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article.

Code public class StaticFinalStringTest {

Public static void main (String [] args) {String a = "x"; String x = new String ("x"); String Q = a + "x"; String p = a + new String ("x");}

}

Data parsed by javap

Compiled from "StaticFinalStringTest.java" public class com.zang.statictest.StaticFinalStringTest {public com.zang.statictest.StaticFinalStringTest (); Code: 0: aload_0 1: invokespecial # 8 / / Method java/lang/Object. "": () V 4: return

Public static void main (java.lang.String [])

Code:

0: ldc # 16 constant to Operand stack / / String x

2: astore_1 stores the reference type or returnAddress type value in the local variable 1

3: new # 18 create class instance / / class java/lang/String

6: a word length at the top of the dup copy stack

7: ldc # 16 / / String x

9: invokespecial # 20 calls the instance method / / Method java/lang/String. "": (Ljava/lang/String;) V that requires special handling

12: astore_2 stores the reference type or returnAddress type value in the local variable 2

13: new # 23 create class instance / / class java/lang/StringBuilder

16: one word length at the top of the dup copy stack

17: aload_1 loads reference type values from local variable 1

18: invokestatic # 25 calls the static method / / Method java/lang/String.valueOf: (Ljava/lang/Object;) Ljava/lang/String in the named class

21: invokespecial # 29 calls the instance method / / Method java/lang/StringBuilder. "": (Ljava/lang/String;) V that requires special handling

24: ldc # 16 constant to Operand stack / / String x

26: invokevirtual # 30 instance method of scheduling object / / Method java/lang/StringBuilder.append: (Ljava/lang/String;) Ljava/lang/StringBuilder

29: invokevirtual # 34 instance method of scheduling object / / Method java/lang/StringBuilder.toString: () Ljava/lang/String

32: astore_3 stores the reference type or returnAddress type value in the local variable 3

33: new # 23 create class instance / / class java/lang/StringBuilder

36: a word length at the top of the dup copy stack

37: aload_1 loads reference type values from local variable 1

38: invokestatic # 25 calls the static method / / Method java/lang/String.valueOf: (Ljava/lang/Object;) Ljava/lang/String in the named class

41: invokespecial # 29 calls the instance method / / Method java/lang/StringBuilder. "": (Ljava/lang/String;) V that requires special handling

44: new # 18 create class instance / / class java/lang/String

47: one word length at the top of the dup copy stack

48: ldc # 16 constant to Operand stack / / String x

50: invokespecial # 20 calls the instance method / / Method java/lang/String. "": (Ljava/lang/String;) V that requires special handling

53: instance method of invokevirtual # 30 scheduling object / / Method java/lang/StringBuilder.append: (Ljava/lang/String;) Ljava/lang/StringBuilder

56: invokevirtual # 34 instance method of scheduling object / / Method java/lang/StringBuilder.toString: () Ljava/lang/String

59: astore 4 will store the reference type or returnAddress type value in a local variable

61: return

}

This is how to create an object in String. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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