A simple Jasmin file demonstrating the use of the jsr instruction.

Hello.jasmin

.bytecode 49.0
.source Hello.j
.class Hello
.super java/lang/Object

; This example method uses a PrintMe subroutine to invoke the System.out.println() method.

.method static usingSubroutine()V
.limit stack 2
.limit locals 2
    ldc "Message 1"
    jsr PrintMe          ; print "Message 1"

    ldc "Message 2"
    jsr PrintMe          ; print "Message 2"

    ldc "Message 3"
    jsr PrintMe          ; print "Message 3"

    return   ; now return from usingSubroutine

; define the PrintMe subroutine ...
PrintMe:
    astore_0            ; store return-address in local variable 1
    astore_1            ; store argument to println()
    ; call System.out.println()
    getstatic java/lang/System/out Ljava/io/PrintStream;
    aload_1             ; load argument for println()
    invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V

    ret 0               ; return to the return-address in local variable 0
.end method

HelloDriver.java

public class HelloDriver {

    public static void main(String[] args) {
        try {
            System.out.println(10);
            Hello.usingSubroutine();
        } catch (Exception ex) {
            System.out.println(ex);
        } finally {
            try {
                System.out.println(24);
            } catch (Exception ex) {
                System.out.println(ex);
            } finally {
                System.out.println(42);
            }
        }
    }

}