More Java questions
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I am confused by the output:class Test1 { int var = 1; Test1() { var = 2; System.out.println(var); } } class Test2 { int var = 1; Test2() { int var = 2; System.out.println(var); } } class MyClass { public static void main(String[ ] args) { Test1 myTest1 = new Test1(); // displays 2 System.out.println(myTest1.var); // displays 2 System.out.println(); Test2 myTest2 = new Test2(); // displays 2 System.out.println(myTest2.var); // displays 1 } } Results: 2 2 2 1 |
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You are declaring an integer var in Test2 constructor which is used in the println. That var in the constructor is not the same var as the field/member of Test2 class. This is called "shadowing" -- the scopes of the variables are different. http://javabeginnerstutorial.com/core-java-tutorial/variable-shadowing/ |
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Thanks for the link xmlspy. |
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I get it now. Test1 has 1 variable named var. Test2 has 2 with same name but are accessed differently through the this keyword. class Test1 { int var = 1; Test1() { var = 2; System.out.println(this.var); System.out.println(var); } } class Test2 { int var = 1; Test2() { int var = 2; System.out.println(this.var); System.out.println(var); } } class MyClass { public static void main(String[ ] args) { Test1 myTest1 = new Test1(); // displays 2 then 2 System.out.println(myTest1.var); // displays 2 System.out.println(); Test2 myTest2 = new Test2(); // displays 1 then 2 System.out.println(myTest2.var); // displays 1 } } Displays: 2 2 2 1 2 1 |
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By the way... the SoloLearn app is really good. But having the blitz community is just icing on the cake when it comes to self learning. |
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Yeah, nice thread this is. I stored the code from here as I had not really learned this yet. |
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Hey Pakz. You messed with 2D cameras in platform games yet ? I was working with a lerp function and a push zone window inside the viewport for that Super Mario World feel. I deviate from my side projects to dip my toe back into Java and Monkey. I like a lot of your examples which I have come across. I find a lot of my stuff mirrors your stuff but generally you are ahead of the curve. I will get some stuff up here someday. I get feeling all inferior to what everyone else can do but I think I am coming to grips that it's okay. My learning can only get better. |
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Oh... your blog I would love to view it but on my tablet it formats everything awfully. Just long long long lines of horizontal text. |
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I am not that familiar with camera's. I just scroll a pixel at a time. I have not found or looked for camera stuff. My old regular aproach seems to work. Getting experienced requires a lot of hours doing the right things. It took me years being able to make platformer games like those from the early ninetees. Nowadays there is a lot more information online that should make it easier to learn how to do it. As for my blog. I also have all the code from those on my github. I put it there last year. It is only the code files but almost everyting should compile straight away without problems.(except that old java stuff) https://github.com/pakz001 |