字符串数组上的Java字节码[putstatic中的类型错误]
我尝试为类编写JVM字节码,等效于以下内容:字符串数组上的Java字节码[putstatic中的类型错误],java,bytecode,java-bytecode-asm,jasmin,Java,Bytecode,Java Bytecode Asm,Jasmin,我尝试为类编写JVM字节码,等效于以下内容: public class foo { static String[] crr; public static void printString(String str) { System.out.println(str); } public static void main(String[] args) { crr = new String[10]; crr[0] = "Hello"; fo
public class foo {
static String[] crr;
public static void printString(String str) {
System.out.println(str);
}
public static void main(String[] args) {
crr = new String[10];
crr[0] = "Hello";
foo.printString(crr[0]);
}
}
我写的字节码:
.class public foo
.super java/lang/Object
.field public static crr [Ljava/lang/String;
.method public <init>()V
aload_0
invokenonvirtual java/lang/Object/<init>()V
return
.end method
.method public static printString(Ljava/lang/String;)V
.limit locals 1
.limit stack 2
getstatic java/lang/System/out Ljava/io/PrintStream;
aload_0
invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V
return
.end method
.method public static main([Ljava/lang/String;)V
.limit stack 20
.limit locals 10
bipush 9
anewarray Ljava/lang/String;
putstatic foo.crr [Ljava/lang/String;
getstatic foo.crr [Ljava/lang/String;
ldc 0
ldc "Hello"
aastore
getstatic foo.crr [Ljava/lang/String;
ldc 0
aaload
invokestatic foo.printString(Ljava/lang/String;)V
return
.end method
有人知道问题出在哪里以及如何解决吗?您在
anewarray
指令中有一个错误。而不是
anewarray Ljava/lang/String;
你需要写作
anewarray java/lang/String
谢谢你能进一步解释我什么时候应该使用“Ljava/lang/String;”或“java/lang/String”吗?@RuoChunZeung名称和描述符的混合很混乱,最后你需要查阅文档():anewarray指令只需要一个类名,而不是描述符。
anewarray java/lang/String