Java bytecode
part 4/9 Β· 28.3 KB total
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Example
Consider the following Java code:
outer:
for (int i = 2; i < 1000; i++) {
for (int j = 2; j < i; j++) {
if (i % j == 0)
continue outer;
}
System.out.println(i);
}
A Java compiler might translate the Java code above into bytecode as
follows, assuming the above was put in a method:
0: iconst_2
1: istore_1
2: iload_1
3: sipush 1000
6: if_icmpge 44
9: iconst_2
10: istore_2
11: iload_2
12: iload_1
13: if_icmpge 31
16: iload_1
17: iload_2
18: irem
19: ifne 25
22: goto 38
25: iinc 2, 1
28: goto 11
31: getstatic #84; // Field java/lang/System.out:Ljava/io/PrintStream;
34: iload_1
35: invokevirtual #85; // Method java/io/PrintStream.println:(I)V
38: iinc 1, 1
41: goto 2
44: return
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