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Stack aa = new Stack() ; float a[][]=new float[3][2]; a[0][0] = (float)0.1; a[0][1] = (float)0.2; a[1][0] = (float)0.3; a[1][1] = (float)0.4; a[2][0] = (float)0.5; a[2][1] = (float)0.6; aa.push(a);