我有一个语法 Gram.ge 我必须用 Jasmin 测试它。文件夹目录包含：
- 克
- 代码生成器.java
- 指令.java
- 主.java
- 操作码.java
- 符号表.java
- 类型.java
- 茉莉.jar
- 包含一些程序（例如 A.pas）的库目录非常简单，根据我的语法编写并保存在 .pas
而父文件夹（上面的那个）包含：
- antlr-3.5-complete.jar
然后从命令提示符 (Windows) 我定位到目录并启动以下命令：
java -cp .;../antlr-3.5-complete.jar Org.anltr.Tool Gram.g
javac -cp .;../antlr-3.5-complete.jar *.java
java -cp .;../antlr-3.5-complete.jar Main/Library/A.pas > Output.j
java -jar jasmin.jar 输出.j
java 输出
CodeGenerator.java 文件：导入 java.util.*；
public class CodeGenerator {
private Vector<Instruction> instructions = new Vector<Instruction>();
private int counter = 0;
public Instruction emit(Opcode opCode) {
Instruction ist = new Instruction(opCode);
instructions.add(ist);
return ist;
}
public Instruction emit(Opcode opCode, int operand) {
Instruction ist = new Instruction(opCode, operand);
instructions.add(ist);
return ist;
}
public void emitLabel(int operand) {
emit(Opcode.LABEL, operand);
}
public int newLabel() {
return counter++;
}
public String toJasmin() {
String temp = "";
temp += header;
for(Instruction ist : instructions)
temp += ist.toJasmin() + "\n";
temp += footer;
return temp;
}
public String toString() {
String temp = "";
for(Instruction ist : instructions)
temp += ist + "\n";
return temp;
}
private static final String header =
".class public Output \n"
+ ".super java/lang/Object \n"
+ "\n"
+ ".method public <init>()V\n"
+ " aload_0 \n"
+ " invokenonvirtual java/lang/Object/<init>()V\n"
+ " return \n"
+ ".end method \n"
+ "\n"
+ ".method public static printBool(I)V\n"
+ " .limit stack 3\n"
+ " getstatic java/lang/System/out Ljava/io/PrintStream;\n"
+ " iload_0 \n"
+ " bipush 1\n"
+ " if_icmpeq Ltrue \n"
+ " ldc \"false\"\n"
+ " goto Lnext \n"
+ "Ltrue:\n"
+ " ldc \"true\"\n"
+ "Lnext:\n"
+ " invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V\n"
+ " return \n"
+ ".end method \n"
+ "\n"
+ ".method public static printInt(I)V\n"
+ " .limit stack 2\n"
+ " getstatic java/lang/System/out Ljava/io/PrintStream;\n"
+ " iload_0 \n"
+ " invokestatic java/lang/Integer/toString(I)Ljava/lang/String;\n"
+ " invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V\n"
+ " return \n"
+ ".end method \n"
+ "\n"
+ ".method public static run()V\n"
+ " .limit stack 1024\n"
+ " .limit locals 256\n";
private static final String footer =
" return \n"
+ ".end method \n"
+ "\n"
+ ".method public static main([Ljava/lang/String;)V\n"
+ " invokestatic Output/run()V\n"
+ " return \n"
+ ".end method \n";
}
除了生成此错误的最后一个（java 输出）之外，这些命令的执行没有任何问题：
Exception in thread "main" java.lang.NoClassDefFoundError:
at Output.run(Output.j)
at Output.main(Output.j)
Caused by: java.lang.ClassNotFoundException:
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more
Output.j 文件是：
.class public Output
.super java/lang/Object
.method public <init>()V
aload_0
invokenonvirtual java/lang/Object/<init>()V
return
.end method
.method public static printBool(I)V
.limit stack 3
getstatic java/lang/System/out Ljava/io/PrintStream;
iload_0
bipush 1
if_icmpeq Ltrue
ldc "false"
goto Lnext
Ltrue:
ldc "true"
Lnext:
invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V
return
.end method
.method public static printInt(I)V
.limit stack 2
getstatic java/lang/System/out Ljava/io/PrintStream;
iload_0
invokestatic java/lang/Integer/toString(I)Ljava/lang/String;
invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V
return
.end method
.method public static run()V
.limit stack 1024
.limit locals 256
ldc 10
ldc 20
ldc 30
imul
iadd
invokestatic printInt(I)V
return
.end method
.method public static main([Ljava/lang/String;)V
invokestatic Output/run()V
return
.end method
A.pas 文件是：
print(10 + 20 * 30)
错误可能在哪里？谢谢