java-如何使用Eclipse或NetBeans编译Java文件而不会出现错误？

Question

I better explain the situation from the start. I wanted to change the resolution for a .jar file, so I decompiled it with Java Decompiler , then I went to Notepad++ and made a small edit, in 2 lines for a .java file:

    paramGraphics.setClip(0, 0, 176, 208);

to this:

    paramGraphics.setClip(0, 0, 320, 240);

And:

paramGraphics.setClip(0, 0, 176, 208);

to this:

paramGraphics.setClip(0, 0, 320, 240);

Then saved. After that, I wanted to compile that file to a class. I tried with javac command, didn't work and showed like 100 errors. It didn't compile. Ten used NetBeans. Same results, it didn't compile.

This is the compiler output in NetBeans:

ant -f "C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4" -Dnb.internal.action.name=rebuild clean jar init: deps-clean: Created dir: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build Updating property file: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\built-clean.properties Deleting directory C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build clean: init: deps-jar: Created dir: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build Updating property file: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\built-jar.properties Created dir: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\classes Created dir: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\empty Created dir: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\generated-sources\\ap-source-output Compiling 1 source file to C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\build\\classes C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:4: error: cannot find symbol public Image jdField_int; symbol: class Image location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:18: error: cannot find symbol public a(InputStream paramInputStream) symbol: class InputStream location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:61: error: cannot find symbol public void jdField_if(Graphics paramGraphics) symbol: class Graphics location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:70: error: cannot find symbol public void a(Graphics paramGraphics) symbol: class Graphics location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:47: error: cannot find symbol this.jdField_int = Image.createImage(this.jdField_do, 0, this.jdField_do.length); symbol: variable Image location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:76: error: cannot find symbol int k = j + b.bD + this.jdField_new[this.jdField_else] + 16; symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:77: error: cannot find symbol int m = i + b.bF + 16; symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:78: error: cannot find symbol int n = i + b.bF + this.jdField_try[this.jdField_else] + 16; symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:79: error: cannot find symbol int i1 = e.jdField_if(m, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:80: error: cannot find symbol int i2 = e.jdField_if(n, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:83: error: cannot find symbol i3 = e.jdField_if(n, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:85: error: cannot find symbol i3 = e.jdField_if(m + 16, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:88: error: cannot find symbol i4 = e.jdField_if(m, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:90: error: cannot find symbol i4 = e.jdField_if(n - 16, k); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:91: error: cannot find symbol int i5 = e.jdField_if(m, k - 16); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:92: error: cannot find symbol int i6 = e.jdField_if(n, k - 16); symbol: variable e location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:100: error: cannot find symbol paramGraphics.setClip(i, j, this.jdField_try[this.jdField_else], this.jdField_new[this.jdField_else] - i7 - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF)); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:107: error: cannot find symbol paramGraphics.setClip(i + 16 + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 32 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:107: error: cannot find symbol paramGraphics.setClip(i + 16 + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 32 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:107: error: cannot find symbol paramGraphics.setClip(i + 16 + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 32 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:107: error: cannot find symbol paramGraphics.setClip(i + 16 + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 32 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:112: error: cannot find symbol paramGraphics.setClip(i + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:112: error: cannot find symbol paramGraphics.setClip(i + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:112: error: cannot find symbol paramGraphics.setClip(i + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:112: error: cannot find symbol paramGraphics.setClip(i + (16 - (i + b.bF & 0xF)), j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 + (i + b.bF & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:119: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:119: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:119: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - 16 - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:124: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:124: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\src\\javaapplication4\\a.java:124: error: cannot find symbol paramGraphics.setClip(i, j + this.jdField_new[this.jdField_else] - (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) - i7, this.jdField_try[this.jdField_else] - (i + b.bF + this.jdField_try[this.jdField_else] & 0xF), (j + b.bD + this.jdField_new[this.jdField_else] & 0xF) + i7); symbol: variable b location: class a 31 errors C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\nbproject\\build-impl.xml:920: The following error occurred while executing this line: C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication4\\nbproject\\build-impl.xml:260: Compile failed; see the compiler error output for details. BUILD FAILED (total time: 2 seconds)

How can I recompile my file to class? I don't know a lot about java, so I'm a newbie in it. Can anyone help me?

Thanks in advance

---

UPDATE!

This is the output log now...

    ant -f "C:\\Users\\USER\\Mis documentos\\NetBeansProjects\\JavaApplication5" -Dnb.internal.action.name=rebuild clean jar
init:
deps-clean:
Updating property file: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\built-clean.properties
Deleting directory C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build
clean:
init:
deps-jar:
Created dir: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build
Updating property file: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\built-jar.properties
Created dir: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\classes
Created dir: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\empty
Created dir: C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\generated-sources\ap-source-output
Compiling 8 source files to C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\build\classes
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\src\javaapplication5\Dun.java:22: error: <identifier> expected
      a.char = true;
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\src\javaapplication5\Dun.java:22: error: not a statement
      a.char = true;
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\src\javaapplication5\Dun.java:22: error: illegal start of expression
      a.char = true;
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\src\javaapplication5\Dun.java:22: error: ';' expected
      a.char = true;
4 errors
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\nbproject\build-impl.xml:920: The following error occurred while executing this line:
C:\Users\USER\Mis documentos\NetBeansProjects\JavaApplication5\nbproject\build-impl.xml:260: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)

Answer 1

You need to have all jars Y which the author used to compile the original class/jar X. Provided the jar X is self-sufficient (ie it does not depend on external jars like Y), then you can just add the original X to the classpath, then try to compile your modified class/jar X again (with your changes included). But almost no jar is self-sufficient these days so probably you will have no much luck. You just need to know all the dependencies which the author used at compile time for producing the jar X.

Answer 2

我的朋友使用任何IDE编译您的代码，它将向您显示错误，然后相应地通过该类添加所需的资源，然后尝试运行它。