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JVM more-catch(多个catch)
JVM more-catch(多个catch)
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| public class Test {
public static void main(String[] args) {
int x = 0;
try {
x = 11;
}catch (IndexOutOfBoundsException e){
x = 22;
}catch (NullPointerException e){
x = 33;
}catch (Exception e) {
x = 44;
}
}
}
|
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| /Library/Java/JavaVirtualMachines/jdk1.8.0_291.jdk/Contents/Home\bin\javap -v Test
Classfile /Users/baoguo/codes/demo/target/classes/Test.class
Last modified Mar 27, 2022; size 791 bytes
MD5 checksum 8ad8face5c32f01e2ef5a7a2cca0b862
Compiled from "Test.java"
public class Test
minor version: 0
major version: 52
flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
#1 = Methodref #6.#32 // java/lang/Object."<init>":()V
#2 = Class #33 // java/lang/IndexOutOfBoundsException
#3 = Class #34 // java/lang/NullPointerException
#4 = Class #35 // java/lang/Exception
#5 = Class #36 // Test
#6 = Class #37 // java/lang/Object
#7 = Utf8 <init>
#8 = Utf8 ()V
#9 = Utf8 Code
#10 = Utf8 LineNumberTable
#11 = Utf8 LocalVariableTable
#12 = Utf8 this
#13 = Utf8 LTest;
#14 = Utf8 main
#15 = Utf8 ([Ljava/lang/String;)V
#16 = Utf8 e
#17 = Utf8 Ljava/lang/IndexOutOfBoundsException;
#18 = Utf8 Ljava/lang/NullPointerException;
#19 = Utf8 Ljava/lang/Exception;
#20 = Utf8 args
#21 = Utf8 [Ljava/lang/String;
#22 = Utf8 x
#23 = Utf8 I
#24 = Utf8 StackMapTable
#25 = Class #21 // "[Ljava/lang/String;"
#26 = Class #33 // java/lang/IndexOutOfBoundsException
#27 = Class #34 // java/lang/NullPointerException
#28 = Class #35 // java/lang/Exception
#29 = Utf8 MethodParameters
#30 = Utf8 SourceFile
#31 = Utf8 Test.java
#32 = NameAndType #7:#8 // "<init>":()V
#33 = Utf8 java/lang/IndexOutOfBoundsException
#34 = Utf8 java/lang/NullPointerException
#35 = Utf8 java/lang/Exception
#36 = Utf8 Test
#37 = Utf8 java/lang/Object
{
public Test();
descriptor: ()V
flags: ACC_PUBLIC
Code:
stack=1, locals=1, args_size=1
0: aload_0
1: invokespecial #1 // Method java/lang/Object."<init>":()V
4: return
LineNumberTable:
line 1: 0
LocalVariableTable:
Start Length Slot Name Signature
0 5 0 this LTest;
public static void main(java.lang.String[]);
descriptor: ([Ljava/lang/String;)V
flags: ACC_PUBLIC, ACC_STATIC
Code:
stack=1, locals=3, args_size=1
0: iconst_0
1: istore_1
2: bipush 11
4: istore_1
5: goto 26
8: astore_2
9: bipush 22
11: istore_1
12: goto 26
15: astore_2
16: bipush 33
18: istore_1
19: goto 26
22: astore_2
23: bipush 44
25: istore_1
26: return
Exception table:
from to target type
2 5 8 Class java/lang/IndexOutOfBoundsException
2 5 15 Class java/lang/NullPointerException
2 5 22 Class java/lang/Exception
LineNumberTable:
line 3: 0
line 5: 2
line 12: 5
line 6: 8
line 7: 9
line 12: 12
line 8: 15
line 9: 16
line 12: 19
line 10: 22
line 11: 23
line 13: 26
LocalVariableTable:
Start Length Slot Name Signature
9 3 2 e Ljava/lang/IndexOutOfBoundsException;
16 3 2 e Ljava/lang/NullPointerException;
23 3 2 e Ljava/lang/Exception;
0 27 0 args [Ljava/lang/String;
2 25 1 x I
StackMapTable: number_of_entries = 4
frame_type = 255 /* full_frame */
offset_delta = 8
locals = [ class "[Ljava/lang/String;", int ]
stack = [ class java/lang/IndexOutOfBoundsException ]
frame_type = 70 /* same_locals_1_stack_item */
stack = [ class java/lang/NullPointerException ]
frame_type = 70 /* same_locals_1_stack_item */
stack = [ class java/lang/Exception ]
frame_type = 3 /* same */
MethodParameters:
Name Flags
args
}
SourceFile: "Test.java"
Process finished with exit code 0
|
声明: 本文采用 BY-NC-SA 授权。转载请注明转自: Ding Bao Guo