java - Trying to load and initialize a shader using jogl -

trying initialize shaders in jogl.

any ideas why error empty? check size of it, , looks larger 0 since "unknown" not printed.

vertexshaderprogram = gl.glcreateshader(gl2.gl_vertex_shader); fragmentshaderprogram = gl.glcreateshader(gl2.gl_fragment_shader); gl.glshadersource(vertexshaderprogram, 1, vsrc, null, 0); gl.glcompileshader(vertexshaderprogram); gl.glshadersource(fragmentshaderprogram, 1, fsrc, null, 0); gl.glcompileshader(fragmentshaderprogram); shaderprogram = gl.glcreateprogram();  gl.glattachshader(shaderprogram, vertexshaderprogram); gl.glattachshader(shaderprogram, fragmentshaderprogram); gl.gllinkprogram(shaderprogram); gl.glvalidateprogram(shaderprogram); intbuffer intbuffer = intbuffer.allocate(1); gl.glgetprogramiv(shaderprogram, gl2.gl_link_status, intbuffer);  system.out.println("got link status");  if (intbuffer.get(0) != 1) {     gl.glgetprogramiv(shaderprogram, gl2.gl_info_log_length, intbuffer);     int size = intbuffer.get(0);     system.err.println("program link error: ");     if (size > 0) {         bytebuffer bytebuffer = bytebuffer.allocate(size);         gl.glgetprograminfolog(shaderprogram, size, intbuffer, bytebuffer);         (byte b: bytebuffer.array()) {             system.err.print((char) b);         }     } else {         system.out.println("unknown");     }     system.exit(1); } 

i error on console, contains no data ..

got link status program link error:  

this fragment shader ..

< file :: fragmentshader.txt > uniform sampler2d fish_y_offset; uniform float alphavalue; void main() {     gl_fragcolor = texture2d(fish_y_offset, gl_texcoord[0].st);     gl_fragcolor.a=alphavalue;  } 

and vertex shader ..

< file :: vertextshader.txt > uniform float wavetime; uniform float wavewidth; uniform float waveheight; void main(void) {     vec4 v = vec4(gl_vertex);     v.y = 11 + sin(wavewidth * v.x + wavetime) * cos(wavewidth * v.z + wavetime) * waveheight;     gl_position = gl_modelviewprojectionmatrix * v;     gl_texcoord[0] = gl_multitexcoord0; } 

check shader logs after each shader compilation.

https://www.khronos.org/opengles/sdk/docs/man/xhtml/glgetshaderinfolog.xml