package com.jvm;

import org.apache.commons.lang3.StringUtils;

//P187

public class E_TestClass {

private int m;

public int inc(){

return m + 1;

}

public int inc2(){

Integer x;

try {

x = 1;

return x; //将 1 放到slot中。执行return指令时，会读取slot，将slot中的值放到操作数栈顶

}catch (Exception e){

x = 2;

return x; //再次改变slot中的值

} finally{

x = 3; //改变x的值不影响返回值，以为返回值已经存储到slot中，未改变slot

}

}

public static void main(String[] args) throws Exception{

System.out.println(StringUtils.equals("", null));

//System.out.println(new E_TestClass().inc2());

}

}

class TestClass {

private int m;

public int incOut(){

int i = inc();

return i;

}

public int inc() {

return m + 1;

}

}